Question

If the diameter of the circle above is 20 mm, what is the area of the circle?

100 mm2
20 mm2
400 mm2
10 mm2

Answer 1

@AlexandervonHumboldt2

Answer 2

So, do you know the formula for area of a circle?

Answer 3

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

Answer 4

That would be a picture of the diameter, not the formula for area

Answer 5

radius=1/2 diameter
are=radius^2*3.14

Answer 6

c

Answer 7

Ok so like I said before your options probably have the pi symbol in them so you don't actually have to multiply by 3.14 here.

Answer 8

Jsut divide the diameter by 2 and square it.

Answer 9

Because: \[A = r^2\pi\]

Answer 10

Nope, it isn't C.