Question

If the diameter of the circle above is 16 mm, what is the area of the circle?

16 mm2
8 mm2
256 mm2
64 mm2

Answer 1

https://app159.studyisland.com/pics/52564diameter.png

Answer 2

radius=1/2*diameter
area=radius^2*pi

Answer 3

i think c

Answer 4

but i didnt gave answers? 64 pi or 200.96

Answer 5

yes C

Answer 6

i wasnt gvaing answer B

Answer 7

d

Answer 8

it was d

Answer 9

Your options probably say like: \[64\pi mm^2\]

Answer 10

Just you can't paste the pi symbol, so most of the times you don't have to actually input pi and you just need radius^2 with the pi symbol next to it.

Answer 11

So the radius is half of the diameter.

16/2 = 8
8^2 = 64
64pi = answer like you already saw