Hey, Geometry nerds

[Somewhat Damaged]

My girlfriend's kid is having some trouble with her geometry homework and while I was able to figure out a part of it last week, I'm having a considerably more difficult time figuring this new bit out. (Before you mock me, bear in mind I took geometry 13 years ago and it was my weakest math subject.) Okay, so the problem is this:

2x - y = 3, (2,6)

1. Graph the point and line (using the slope intercept formula for the line)

2. Find the equation of the line to 1st line through the point

3. Find point of intercept by setting the 2 lines equal

4. Use the distance formula to find the distance between the original point and point of intercept

Part 2 and 3 are what I'm getting hung up on. Any help would be greatly appreciated. And do it fast! She's got a test to study for. Thanks.

[menikmati]

Oh man I use to be an ace at Geometry (had straight A's in my class, one guy even copied off my test and got caught!). I'm lacking now though, I would need like a 2 min refresher on how to do this stuff, and I bet I could nail it then.

[Mr. Dylanja]

This proves that google can't always be your friend.

[marooko]

im stoned. im outta here. goodbye folks.

[menikmati]

My girlfriend's kid is having some trouble with her geometry homework and while I was able to figure out a part of it last week, I'm having a considerably more difficult time figuring this new bit out. (Before you mock me, bear in mind I took geometry 13 years ago and it was my weakest math subject.) Okay, so the problem is this:

2x - y = 3, (2,6)

1. Graph the point and line (using the slope intercept formula for the line)

2. Find the equation of the line to 1st line through the point

3. Find point of intercept by setting the 2 lines equal

4. Use the distance formula to find the distance between the original point and point of intercept

Part 2 and 3 are what I'm getting hung up on. Any help would be greatly appreciated. And do it fast! She's got a test to study for. Thanks.

I'm a bit rusty at this, but using the formual y = mx + b, wouldn't your formula end up being y = 2x - 3. So you start at -3 on the y axis, and use the slope of 2 (which is really 2/1), so you go up 2 and over 1 on the x-asis...and so on. That sets the slope (positive slope) for your first formula. I forget what you do with the (2,6).

[Mr. Dylanja]

I'm a bit rusty at this, but using the formual y = mx + b, wouldn't your formula end up being y = 2x - 3. So you start at -3 on the y axis, and use the slope of 2 (which is really 2/1), so you go up 2 and over 1 on the x-asis...and so on.


WOW, this is like coming out of a coma.

[Hannahrain]

Look, I colored in the grid to make a pony!

[menikmati]

Nevermind...

[menikmati]

just look in the back of the book, hopefully it's an odd numbered question

[menikmati]

are you sure you're not missing an extra set of coordinates? You can't graph or find a slope with just (2,6)...you need two sets. If there is another set, then I could do this problem, and it would make a lot more sense.

[Somewhat Damaged]

Yeah, I did the graph before, and have graphed the y = 2x -3 equation and the (2,6) coordinates. The question I was able to figure out last week called for me to draw a perpendicular line from the (2,6) coordinates to the y = 2x - 3 line and determine what the distance was from the coordinates to the line.
Like I said, parts 2 and 3 -- find the equation of the line to 1st line through the point, and find point of intercept by setting the 2 lines equal -- is what's tripping me up. I'm thinking part 2 is asking for the equation of the line that goes from (2,6) and intercepts y = 2x - 3, so the perpendicular line that I found before. Thing is, I have NO fucking idea how to figure that out. Maybe when I was 15 I could've, and I even tried reading the book but it provided no insight. I think if I were to be given the information on how to figure out that part of the problem, I can probably figure out the rest of it.

[Somewhat Damaged]

are you sure you're not missing an extra set of coordinates? You can't graph or find a slope with just (2,6)...you need two sets. If there is another set, then I could do this problem, and it would make a lot more sense.

No, you don't need a second set of coordinates. That second set is provided by the point on the y = 2x - 3 line which (2,6) is perpendicular to. If that point, for instance, happened to be (4,5), then the slope would be...whatever it happens to be from (2,6) to (4,5). That's the shit I'm clueless about right now.

And while this problem does happen to be an odd numbered one and the answer is in the back of the book, this new problem that the teacher posed is not the answer posed by the book. Thus, this answer cannot be provided by the book. Trust me, that's the first thing I looked for.

[Somewhat Damaged]

No worries, one of her friends was paying better attention in class and now my interest has waned.

[mymy123]

WOW, this is like coming out of a coma.

lulz

[samiksha]

do you still need help? i'll PM you. this is really sad by the way guys. really. sad.

[wmgaretjax]

you can find the second line with just one pair of coordinates because you SHOULD know the slope of that second line (hint: perpindicular to the first)

[samiksha]

but wmghuidfjdsh what is perpendicular!?!??!!?!?

[samiksha]

okay sorry im being sassy

[wmgaretjax]

you're really torn up that there are people up there that stopped giving a shit about geometry when they left the class and never had to use it again...

[menikmati]

you can find the second line with just one pair of coordinates because you SHOULD know the slope of that second line (hint: perpindicular to the first)

Yes that's what I was thinking too....but then I got lazy.

[samiksha]

i know, im sorry you guys......... ive been drinking....... im a math snob.....

[wmgaretjax]

I enjoy math, despite having not taken any real math classes since Calculus 5 years ago.... That physics series I took in college didn't really count, even though it was a bit of refresher in some ways.

[real talk]

I took geometry 16 years ago, I remember very little. I love graph paper though and pencils and rulers and compasses. Math feels good when you get it right. I loved accounting in college fixing up that balance sheet.

How old is Captn Crzy's kid to be doing this kind of math?

edit to comment on wmgaretjax's thing about physics: I took one physics course in college and I passed it because I engaged the professor in a discussion about the non-exclusivity between science and religion. I didn't even take the midterm.

[samiksha]

i hate me some physics

[samiksha]

because................ the physics people dont care enough about math!

[real talk]

Hey Samiksha, you know what I like? Basic algebra. I could do that shitty for days with a smile.

[gaypalmsprings]

http://www.zonersports.com/wp-content/1089/320/geo.jpg

[menikmati]

I like math.

[samiksha]

i know, its very satisfying.

[gaypalmsprings]

math > meth

[menikmati]

I should of continued into Calculus, but I chose not to and took computer tech/repair classes instead. No regrets though. I would of only wanted to know calculus if I was gonna become a hardcore programmer. But I don't use C or php or whatever anyway. Me stick to CF.

[real talk]

math > meth

I need a shirt that says that.

[gaypalmsprings]

I took differential equations & can't remember a thing now. But it was fun at the time.

[Young blood]

I need a shirt that says that.

srsly that deserves props.

[Mr. Dylanja]

I need to see more caricatures! Did you lose the passion? Did it stop being real?

[wmgaretjax]

There's this weird curve with physics folks... On the low level they only care about math enough to plug and play, and on the high/theoretical level they couldn't care less... Somewhere in the middle you can find some math junkies though.

First quarter of physics I only attended one day of class besides the midterm and final... I was not able to get away with that the third quarter though, had to attend class at least semi-regularly.

[Stackamynutz]

I know this is somewhat off topic, but why do kids have to learn this? I mean basic math (addition, subtraction, multiplication, division, percents, fractions, etc..) makes sense to have to learn. It's applicable to daily life. But stuff like this will prove little to no real-world use for 9 out of 10 students. After basic math the classes should be college courses for specific degrees or careers. I'm good at math, but as with many of my other strong points, it serves me very little benefit in life (I've never gotten a one-up on a job over a guy cause I didn't have to use a calculator and he did).

[real talk]

I need to see more caricatures! Did you lose the passion? Did it stop being real?

Who me? It's always real. But there's a new game in town and I perform solo.

I know this is somewhat off topic, but why do kids have to learn this? I mean basic math (addition, subtraction, multiplication, division, percents, fractions, etc..) makes sense to have to learn. It's applicable to daily life. But stuff like this will prove little to no real-world use for 9 out of 10 students. After basic math the classes should be college courses for specific degrees or careers. I'm good at math, but as with many of my other strong points, it serves me very little benefit in life (I've never gotten a one-up on a job over a guy cause I didn't have to use a calculator and he did).

I think it's important for a person to at least once in their life grasp the fundamental reasons behind things. Also, I'm sure the thinking is good for them brain developings and whatnot.

[cansei de ser sexme]

I took geometry last summer. :)

[menikmati]

I know this is somewhat off topic, but why do kids have to learn this? I mean basic math (addition, subtraction, multiplication, division, percents, fractions, etc..) makes sense to have to learn. It's applicable to daily life. But stuff like this will prove little to no real-world use for 9 out of 10 students. After basic math the classes should be college courses for specific degrees or careers. I'm good at math, but as with many of my other strong points, it serves me very little benefit in life (I've never gotten a one-up on a job over a guy cause I didn't have to use a calculator and he did).

Perhaps, so when they get into college they can make it into higher end classes, especially if they go into the computer science/math fields. Plus it can be applied to several other job fields, and it would be pretty lame if people didn't learn that basic stuff until they're adults.

[real talk]

They'd be like boys, in the adult hood.





















I'm sorry.

[menikmati]

funny

[SoulDischarge]

I'm not against learning math, but kids should have to learn how to get a job or rent an apartment and shit like that before they get into advanced mathematics. I could have gotten an A in any class I felt like applying myself to in high school, and I've had the most difficult time doing pretty much all the real life bullshit. I sure could have used House Hunting 101 way more than AP Physics. End sorry state of our educational system rant.

[real talk]

funny

You ruined it when you edited. Now my joke is lamer than ever.

[real talk]

I'm not against learning math, but kids should have to learn how to get a job or rent an apartment and shit like that before they get into advanced mathematics. I could have gotten an A in any class I felt like applying myself to in high school, and I've had the most difficult time doing pretty much all the real life bullshit. I sure could have used House Hunting 101 way more than AP Physics. End sorry state of our educational system rant.

You were in AP Physics and you didn't know how to find a place to live?

[menikmati]

You ruined it when you edited. Now my joke is lamer than ever.

I'm afraid of internet embarrassment. :sorry

[Hannahrain]

You were in AP Physics and you didn't know how to find a place to live?

He must not have carried the one.

[shakermaker113]

I know this is somewhat off topic, but why do kids have to learn this? I mean basic math (addition, subtraction, multiplication, division, percents, fractions, etc..) makes sense to have to learn. It's applicable to daily life. But stuff like this will prove little to no real-world use for 9 out of 10 students.

think of it like an exercise. a lot of what people do in the gym has no practical use. when do you need to lift 100 lbs? when do you need to run 3 miles? never. but if you can do that in a gym, the shit you do in the real world is effortless. if you can pass math classes, you won't need to think twice about any real world math.

unless you're an engineer. then it comes in handy.

[real talk]

Or an architect, a pharmacist, etc.

[Somewhat Damaged]

How old is Captn Crzy's kid to be doing this kind of math?

She's 9.

[SoulDischarge]

You were in AP Physics and you didn't know how to find a place to live?

I've found places to live, but usually through friends. Just saying basic real life skills like finding and financing a place of residence, landing a decent job, taking care of yr taxes, cooking healthy eats, etc are all necessary and sometimes complicated skills that aren't given nearly enough emphasis in the education system, whereas advanced math and science skills that only a small percentage of the people learning them will ever use again get pounded into you. Sure, you should learn some of that stuff from yr parents, but that doesn't always happen. Priorities are all fucked up.

[real talk]

I guess I just learned that stuff from my parents.

She's 9.

That's incredible. Kids are getting smarter. We are nipping at China's heels.

[menikmati]

You know I always wanted to be an architect!

[Barbara, the ninja]

That's incredible. Kids are getting smarter. We are nipping at China's heels.

NOT EVEN CLOSE

Children are taught algebra in utero!

[SoulDischarge]

In China, they genetically alter the mother's uterus so that it's some kinda of Tomb Raider puzzle barrier that only opens when the fetus successfully graphs a parabola. Those who fail are terminated and sold as a delicacy in North Korea.

[Hannahrain]

The lesser known but just as action-packed Womb Raider.

[ivankay]

bwah.

[orbit]

I should of continued into Calculus, but I chose not to and took computer tech/repair classes instead. No regrets though. I would of only wanted to know calculus if I was gonna become a hardcore programmer. But I don't use C or php or whatever anyway. Me stick to CF.

oh man, too bad you don't use C. I took calculus 1,2,3,4 and didn't take my computer programming required class (C, C++) when i had to. i'm taking it this semester and i hate it. my midterm is next week and if i don't get at least b i think i'm dropping that class.

[indietron]

I have to take Business Calculus next semester and im really not looking forward to it :(

[menikmati]

oh man, too bad you don't use C. I took calculus 1,2,3,4 and didn't take my computer programming required class (C, C++) when i had to. i'm taking it this semester and i hate it. my midterm is next week and if i don't get at least b i think i'm dropping that class.

If I was to do it over, I would of done calculus and gone into programming (C, C++ like you said)....but for now I've stuck to just web developing and building applications with ColdFusion. It's not advanced or really "programming" but I love it.

[wmgaretjax]

CF is an interesting platform, but it's hard to imagine using something that is neither open source nor oop....

I started with Java and am now spending most of my time in objective C...

[menikmati]

Well if the web is your destination, I would have to lobby for the use of CF. I mean I know it's not open source (at least not Adobe's engine), but it can handle pretty much anything you can throw at it for web/database purposes. I mean really, CF was built for databases....why people would wanna run PHP or whatever over CF for a database is beyond me. The ease of setting it up, using SQL, and developing off it...it's so quick and easy.

The only downside is you usually have to pay extra to have it....but I think it's well worth it, if you wanna develop faster and easier. I've been using it for 4 years now. I love it. I run all my sites off it.

Again though, I think learning Java and C would be nice and useful.

[wmgaretjax]

From my limited experience, a multi-pronged approach is generally best... But I'm naive on the web end of things. I'll have to look into it a little more.

[shakermaker113]

I've found places to live, but usually through friends. Just saying basic real life skills like finding and financing a place of residence, landing a decent job, taking care of yr taxes, cooking healthy eats, etc are all necessary and sometimes complicated skills that aren't given nearly enough emphasis in the education system, whereas advanced math and science skills that only a small percentage of the people learning them will ever use again get pounded into you. Sure, you should learn some of that stuff from yr parents, but that doesn't always happen. Priorities are all fucked up.

after doing advanced math and science those every day things like taxes, cooking, finding a place to live, etc should all be easy to figure out. do you really want everything to be spelled out for you? though I agree on the job search thing.

[captncrzy]

i know, im sorry you guys......... ive been drinking....... im a math snob.....

Good to know; I'll have her PM you directly next time.

I took geometry 16 years ago, I remember very little. I love graph paper though and pencils and rulers and compasses. Math feels good when you get it right. I loved accounting in college fixing up that balance sheet.

How old is Captn Crzy's kid to be doing this kind of math?

edit to comment on wmgaretjax's thing about physics: I took one physics course in college and I passed it because I engaged the professor in a discussion about the non-exclusivity between science and religion. I didn't even take the midterm.

She's 15; freshman. About the same age that I struggle with Geometry.

I know this is somewhat off topic, but why do kids have to learn this? I mean basic math (addition, subtraction, multiplication, division, percents, fractions, etc..) makes sense to have to learn. It's applicable to daily life. But stuff like this will prove little to no real-world use for 9 out of 10 students. After basic math the classes should be college courses for specific degrees or careers. I'm good at math, but as with many of my other strong points, it serves me very little benefit in life (I've never gotten a one-up on a job over a guy cause I didn't have to use a calculator and he did).


I dunno; it's an AZ requirement.

I'm not against learning math, but kids should have to learn how to get a job or rent an apartment and shit like that before they get into advanced mathematics. I could have gotten an A in any class I felt like applying myself to in high school, and I've had the most difficult time doing pretty much all the real life bullshit. I sure could have used House Hunting 101 way more than AP Physics. End sorry state of our educational system rant.

Funny you mentioned this; I was saying last night that in high school, we were required to take three years of math with the third year being our choice of math class. I chose "Math for Life". It taught me how to do my taxes, balance my checkbook, etc. One of the best classes I ever took.

[real talk]

Hey that guy lied to me.

[captncrzy]

He's probably still proud his shenanigans, too.

[real talk]

She's still a year younger than I was when I took it.

[amyzzz]

just look in the back of the book, hopefully it's an odd numbered question
HAHAHAHA, I remember those.

[amyzzz]

I should of continued into Calculus, but I chose not to and took computer tech/repair classes instead. No regrets though. I would of only wanted to know calculus if I was gonna become a hardcore programmer. But I don't use C or php or whatever anyway. Me stick to CF.
I took pre-calculus and AP calculus in high school because I generally did well in math, but it turns out I don't really have any sort of aptitude in math; I just tried really hard. I don't remember any of it now. :(

[TomAz]

rick did you get an answer yet? i've got it.

I got it because I helped my 16 yr old through this a couple years ago.






well anyway dunno when you'll see this so here's the answer

y=2x-3. slope 2. so the perpindicular will have a slope that is the opposite and reciprocal. y=-1/2 x +b. putting x=2, y=6 in there and solving for b we get y = -1/2 x + 7 for the equation of the perpindicular line that passes through (2,6)

now set 2x-3 = -1/2 x + 7. we get x = 4 and then y = 5. so the point of intersection of the two lines is (4,5)

[real talk]

You didn't read the thread.

[TomAz]

I skimmed it. then I just now re-skimmed it and I still dont' see the answer.

[real talk]

He said her friend helped her figure it out. Now I'm being you.

[TomAz]

It feels good, doesn't it?

[ivankay]

i wish i had Photoshop skills to do the "Being TomAz" poster.

[captncrzy]

rick did you get an answer yet? i've got it.

I got it because I helped my 16 yr old through this a couple years ago.






well anyway dunno when you'll see this so here's the answer

y=2x-3. slope 2. so the perpindicular will have a slope that is the opposite and reciprocal. y=-1/2 x +b. putting x=2, y=6 in there and solving for b we get y = -1/2 x + 7 for the equation of the perpindicular line that passes through (2,6)

now set 2x-3 = -1/2 x + 7. we get x = 4 and then y = 5. so the point of intersection of the two lines is (4,5)



I'm going to forward this to her anyway; her friend may be an idiot.

[Somewhat Damaged]

rick did you get an answer yet? i've got it.

I got it because I helped my 16 yr old through this a couple years ago.






well anyway dunno when you'll see this so here's the answer

y=2x-3. slope 2. so the perpindicular will have a slope that is the opposite and reciprocal. y=-1/2 x +b. putting x=2, y=6 in there and solving for b we get y = -1/2 x + 7 for the equation of the perpindicular line that passes through (2,6)

now set 2x-3 = -1/2 x + 7. we get x = 4 and then y = 5. so the point of intersection of the two lines is (4,5)

Thanks, Tom. The funny/aggravating thing is, I figured out that the point of intersection was (4,5) last week without having to go through all the equation nonsense. I don't know how I knew, I just knew. And I've completely forgotten all about how to determine what the slope of a perpendicular line is to another equation.

Samiksha: Considering I've been working for 12 years and have had absolutely ZERO encounters with any sort of geometry in that time, I don't feel terribly bad about not recalling how to do this problem. It bears no relevance whatsoever to my life. Give me an algebra problem, I can probably do it. Ask me to figure out tax percentages for my customers, I'm a fucking pro. So don't get all tiffy with me, sister.