Question

Which figures can be used to find the area of the composite figure?



Choose exactly two answers that are correct.













A.

a rectangle with an area of 34 cm2








B.

a rectangle with an area of 72 cm2








C.

a quarter circle with an area of 16pi cm2








D.

a quarter circle with an area of 64pi cm2


http://static.k12.com/calms_media/media/1571000_1571500/1571277/1/e38d65ab89b90b52d55cfd5124feb4f263ee7f6a/MS_IMB-1401208-1110603.jpg

Answer 1

C and A is my answere

Answer 2

calculate the area of the rectangle first
length= 9, width=8
what did you get?

then use quarter of circle
radius=8
what did you get?

Answer 3

9*8=72 , so it's not A

Answer 4

for the quarter circle, what did you get?

Answer 5

oh ok so its B and C

Answer 6

lolxD

wait let me calculate it to check if that's right
8^2*1/4*pi=??

nope C is wrong. don't forget that you are looking for the QUARTER of the circle so you have to divide it by 4

Answer 7

oh that's what did wrong ok so my last and only option is D

Answer 8

do you know why it's not C?

Answer 9

because I calculated my answer wrong