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superraymondBest ResponseYou've already chosen the best response.0
can you help me first
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
dw:1364254756475:dw Find the area of ABCD.
 one year ago

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

LizzyLove<3Best ResponseYou've already chosen the best response.1
Ok like this??dw:1364255189854:dw
 one year ago

HoaBest ResponseYou've already chosen the best response.0
perfect, 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????
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
b*h = Area for rectangle and parallelogram
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
are you sure that BC = 8?
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
it would make things a lot easier if BC = 8
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
i meant, BC = 6
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Yea:) @jim_thompson5910 It does!!
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Oh i know what ur saying... @jim_thompson5910
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
anyways, 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
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
that length is 32 dw:1364255489567:dw
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
this length is 22 dw:1364255516091:dw so this remaining length here dw:1364255533268:dw must be 10
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
since 22+10 = 32
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Nvm i know what urr doing:)
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
We now have this triangle dw:1364255559257:dw
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
And so u have to do the pythagoreum theorm thing...
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
it'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
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
But u cant do tht, if it doesnt say in my HW...
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
if x was this length dw:1364255675546:dw
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
then 10x must be this length here dw:1364255697460:dw
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Hold on there bro, let me see what ur doing, plz ... @jim_thompson5910
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
so what this means is that we can say x^2 + h^2 = 6^2 and h^2 + (10x)^2 = 8^2
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
alright sorry
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
dw:1364255854635:dw I dont get what u did here... @jim_thompson5910
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
I broke up that length of 10 into two pieces
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
one piece is x units long the other is 10x units long
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
both add back up to 10 (x) + (10x) = x + 10x = 10
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
So y can t u just leave it as 10??
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
because breaking up this length of 10 will help us find the height h
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
it's not the only way to find h, but it's probably one of the easier ways
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
dw:1364256139846:dw
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
yes you break up the triangle like that and that will help you find h
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
ok so now it makes sense...
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
this 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
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
this 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
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
with me so far?
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Kinda, i still dont get y u did 10  x ?? lol sry
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
well if you break up 10 into two pieces, then one piece is x units long the other must be 10x units long
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
example if x was say x = 2 inches, then the first piece would be 2 inches the remaining bit would be 10x = 102 = 8 inches
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Yea i get it but y can u just split it in half??
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
they must add back up to 10, and they do x + (10x) 2 + (8) 10
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
because we do NOT know whether the length h cuts the side 10 in half or not
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
it could, but it could not (in this case, it doesn't) we just don't know
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
so that's why we must go this route
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
ok... sry for tht, its just i need to know how to do this, thxss :) so wats next?
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
no need for sorries, questions are good
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
ok we have these two equations x^2 + h^2 = 36 (10x)^2 + h^2 = 64
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
we can either use substitution or elimination to solve for x and h
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
let's do substitution
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
ok, 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.
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Can we just assume, b/c it's a right angle??
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
Start 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
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
This is why I asked if BC was 8 or not If BC = 6, then you could split the 10 into two equal pieces
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
k let me get this down...
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
So how did u get these two equations?? (10x)^2 + h^2 = 64 x^2 + h^2 = 36
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
through the use of the pythagorean theorem
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
a^2 + b^2 = c^2
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
it's explained a bit more above
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
where did u get 36 from?
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
from squaring the 6
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
So is it sub or elim tht ur doing ? @jim_thompson5910
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
@jim_thompson5910 ??
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
I'm doing substitution
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
I isolated h^2 in the first equation and then replaced the other h^2 in the second equation with 36  x^2
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
notice how the h terms went away after that
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
kk i need to write this
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
Sry it took so long... but is this 3.6??
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
btw I showed how it's x = 3.6 above lol but I'm glad you got that on your own
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
dw:1364258514592:dw
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
yep, that length you are pointing to is 3.6 units long
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
so 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
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
So the height is 4.8
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
So is tht for this one??
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
dw:1364258641203:dw
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
no this one here dw:1364258674211:dw
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
that's what we wanted we really don't need x to find the area we only needed x to find h
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
So, i thought u said that
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
dw:1364258753145:dw trhis length is 10  x ??
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
but we found x, then used that to find h
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
we don't need to know what 10x is we just want h
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
So the last equation u put was to find 'h' right??
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
k hold on let me get tht down..
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
I started with x^2 + h^2 = 36, plugged in x = 3.6, then solved for h
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
OK!! lol i get what we did, so whats next?? Do we just do 32 * 4.8??
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
ok that's a lot of work to find h
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
like I said, it would be a lot easier if BC = 6
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
but it's still doable to find h even if BC wasn't 6
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
so was i right?? or is there a different way to do this?
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
anyways, this is a trapezoid with base1 = 32 base2 = 22 height = 4.8
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
so we can find the area using this formula A = h*(b1+b2)/2 where in this case h = 4.8 b1 = 32 b2 = 22
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
A = h*(b1+b2)/2 A = 4.8*(32+22)/2 A = 4.8*(54)/2 A = 4.8*27 A = 129.6
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
So thts it?? @jim_thompson5910
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
yep pretty much, unless you want to convert that into a fraction
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
No thank u, i perfer decimals:)
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
yeah decimals are more intuitive with area problems
 one year ago

LizzyLove<3Best ResponseYou've already chosen the best response.1
THANK THANK YOU SOOOOSOSOOOO MUCH:D:D:D:D: :):) UR THE BEST :D:D:D
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.2
lol thx and glad to be of help
 one year ago
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