A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years ago
Please help with geometry!!!
anonymous
 3 years ago
Please help with geometry!!!

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0can you help me first

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1364254756475:dw Find the area of ABCD.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0let CO is the height of the triangle, and let F is the point between A and O. redraw it. I guide you then

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Ok like this??dw:1364255189854:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0perfect, now, you have 2 regions. right? and you have formula to get the answer, try, the first region is parralelogram ADCF, the area formula is????

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0b*h = Area for rectangle and parallelogram

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2are you sure that BC = 8?

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2it would make things a lot easier if BC = 8

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2i meant, BC = 6

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Yea:) @jim_thompson5910 It does!!

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Oh i know what ur saying... @jim_thompson5910

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2anyways, we need CO, which will give us the height needed to find the area of the paralleogram but before we find CO, we need FB

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2that length is 32 dw:1364255489567:dw

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2this length is 22 dw:1364255516091:dw so this remaining length here dw:1364255533268:dw must be 10

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2since 22+10 = 32

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Nvm i know what urr doing:)

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2We now have this triangle dw:1364255559257:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0And so u have to do the pythagoreum theorm thing...

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2it's not drawn to scale because this is actually a right triangle with hypotenuse of 10 so it really looks like this dw:1364255624494:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0But u cant do tht, if it doesnt say in my HW...

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2if x was this length dw:1364255675546:dw

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2then 10x must be this length here dw:1364255697460:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Hold on there bro, let me see what ur doing, plz ... @jim_thompson5910

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2so what this means is that we can say x^2 + h^2 = 6^2 and h^2 + (10x)^2 = 8^2

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1364255854635:dw I dont get what u did here... @jim_thompson5910

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2I broke up that length of 10 into two pieces

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2one piece is x units long the other is 10x units long

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2both add back up to 10 (x) + (10x) = x + 10x = 10

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So y can t u just leave it as 10??

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2because breaking up this length of 10 will help us find the height h

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2it's not the only way to find h, but it's probably one of the easier ways

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1364256139846:dw

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2yes you break up the triangle like that and that will help you find h

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0ok so now it makes sense...

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2this first triangle here dw:1364256244802:dw has legs of x and h, with hypotenuse 6, so a^2 + b^2 = c^2 x^2 + h^2 = 6^2 x^2 + h^2 = 36

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2this triangle here is a right triangle with leg1 = 10x leg2 = h hypotenuse = 8 which means a^2 + b^2 = c^2 (10x)^2 + h^2 = 8^2 (10x)^2 + h^2 = 64

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2with me so far?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Kinda, i still dont get y u did 10  x ?? lol sry

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2well if you break up 10 into two pieces, then one piece is x units long the other must be 10x units long

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2example if x was say x = 2 inches, then the first piece would be 2 inches the remaining bit would be 10x = 102 = 8 inches

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Yea i get it but y can u just split it in half??

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2they must add back up to 10, and they do x + (10x) 2 + (8) 10

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2because we do NOT know whether the length h cuts the side 10 in half or not

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2it could, but it could not (in this case, it doesn't) we just don't know

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2so that's why we must go this route

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0ok... sry for tht, its just i need to know how to do this, thxss :) so wats next?

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2no need for sorries, questions are good

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2ok we have these two equations x^2 + h^2 = 36 (10x)^2 + h^2 = 64

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2we can either use substitution or elimination to solve for x and h

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2let's do substitution

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0ok, i think there is a way simpler way... im pretty sure tht u can split tht in half, my teacher said tht we wouldn't need to use sub. or eli.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Can we just assume, b/c it's a right angle??

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2Start with equation 1 and isolate h^2 (not h, just h^2) x^2 + h^2 = 36 h^2 = 36  x^2  Now replace h^2 in equation 2 with 36  x^2 (since h^2 = 36  x^2 above) (10x)^2 + h^2 = 64 (10x)^2 + (36  x^2) = 64 Now FOIL out, expand and simplify (10x)^2 + (36  x^2) = 64 100  20x + x^2 + 36  x^2 = 64 100  20x + 36 = 64 136  20x = 64 20x = 64136 20x = 72 x = 72/(20) x = 18/5 x = 3.6

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2This is why I asked if BC was 8 or not If BC = 6, then you could split the 10 into two equal pieces

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0k let me get this down...

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So how did u get these two equations?? (10x)^2 + h^2 = 64 x^2 + h^2 = 36

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2through the use of the pythagorean theorem

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2a^2 + b^2 = c^2

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2it's explained a bit more above

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0where did u get 36 from?

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2from squaring the 6

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So is it sub or elim tht ur doing ? @jim_thompson5910

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2I'm doing substitution

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2I isolated h^2 in the first equation and then replaced the other h^2 in the second equation with 36  x^2

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2notice how the h terms went away after that

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0kk i need to write this

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Sry it took so long... but is this 3.6??

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2btw I showed how it's x = 3.6 above lol but I'm glad you got that on your own

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1364258514592:dw

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2yep, that length you are pointing to is 3.6 units long

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2so x^2 + h^2 = 6^2 x^2 + h^2 = 36 (3.6)^2 + h^2 = 36 12.96 + h^2 = 36 h^2 = 36  12.96 h^2 = 23.04 h = sqrt(23.04) h = 4.8

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2So the height is 4.8

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So is tht for this one??

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1364258641203:dw

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2no this one here dw:1364258674211:dw

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2that's what we wanted we really don't need x to find the area we only needed x to find h

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So, i thought u said that

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1364258753145:dw trhis length is 10  x ??

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2but we found x, then used that to find h

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2we don't need to know what 10x is we just want h

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So the last equation u put was to find 'h' right??

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0k hold on let me get tht down..

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2I started with x^2 + h^2 = 36, plugged in x = 3.6, then solved for h

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0OK!! lol i get what we did, so whats next?? Do we just do 32 * 4.8??

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2ok that's a lot of work to find h

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2like I said, it would be a lot easier if BC = 6

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2but it's still doable to find h even if BC wasn't 6

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so was i right?? or is there a different way to do this?

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2anyways, this is a trapezoid with base1 = 32 base2 = 22 height = 4.8

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2so we can find the area using this formula A = h*(b1+b2)/2 where in this case h = 4.8 b1 = 32 b2 = 22

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2A = h*(b1+b2)/2 A = 4.8*(32+22)/2 A = 4.8*(54)/2 A = 4.8*27 A = 129.6

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So thts it?? @jim_thompson5910

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2yep pretty much, unless you want to convert that into a fraction

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0No thank u, i perfer decimals:)

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2yeah decimals are more intuitive with area problems

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0THANK THANK YOU SOOOOSOSOOOO MUCH:D:D:D:D: :):) UR THE BEST :D:D:D

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.2lol thx and glad to be of help
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.