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Mathematics 9 Online
OpenStudy (chunkymonkay):

Does anyone want a medal and fan!!?? just help me with one question.

OpenStudy (chunkymonkay):

OpenStudy (chunkymonkay):

@bibby

OpenStudy (bibby):

draw a line down from the topmost point splitting the bottommost side in half what would be the length of each half?

OpenStudy (chunkymonkay):

15?

OpenStudy (chunkymonkay):

@bibby

OpenStudy (bibby):

yeah so we're left with this triangle.|dw:1427687094104:dw|

OpenStudy (bibby):

use the pythagorean therorem to find x then plug into the area formula \( A = \dfrac{1}{2}bh\)

OpenStudy (chunkymonkay):

225

OpenStudy (bibby):

is that the area?

OpenStudy (chunkymonkay):

i believe but do i need to find the square root

OpenStudy (bibby):

I have no idea what you're doing if you aren't showing work

OpenStudy (chunkymonkay):

okay i did 30 x 15 x 1/2 and got 225

OpenStudy (bibby):

the height is x, not 30. we're finding x with the pythagorean thoerem first

OpenStudy (chunkymonkay):

7.5?

OpenStudy (chunkymonkay):

u r smart, I am not!!!!!

OpenStudy (bibby):

I'm not smart, I just already learned this stuff

OpenStudy (bibby):

\(15^2+x^2=30^2\)

OpenStudy (chunkymonkay):

900?

OpenStudy (bibby):

we're solving for x. you've done the same problems all day...

OpenStudy (chunkymonkay):

yeah and its complicated and this is my last question

OpenStudy (bibby):

solve for x then \(15^2+x^2=900\)

OpenStudy (chunkymonkay):

25 x 25 =625

OpenStudy (bibby):

again, pretend I'm your teacher I'm a cute, mid 20s black man, with a soft voice. I need to see work ma'am

OpenStudy (chunkymonkay):

15*15=225-900=675 i need to find what equals 675 lol ur funny

OpenStudy (bibby):

sqrt(675)=x

OpenStudy (chunkymonkay):

25.98 rounded would be 26 right

OpenStudy (bibby):

now you can plug the numbes in

OpenStudy (bibby):

so |dw:1427688397546:dw|

OpenStudy (chunkymonkay):

390

OpenStudy (chunkymonkay):

19.9 is the square root

OpenStudy (bibby):

full area comes out 389.71 which rounds up to 390 no need for square roots...

OpenStudy (chunkymonkay):

oh okay

OpenStudy (chunkymonkay):

so 390 is the answer

OpenStudy (bibby):

yea

OpenStudy (chunkymonkay):

okay thanks youuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu!!!!!!!!!!!!!!

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