Question

How do you find the radius of a quarter circle?

Answer 1

for a three quarter circle?

Answer 2

No, just one. There is one quarter of the circle, and I'm supposed to find the radius of it.

Answer 3

How do I do that?

Answer 4

The formula is diameter times pi for c

Answer 5

So, d x pi =c?

Answer 6

I'm looking for the radius.

Answer 7

If the area of the quarter circle is 16π sq. m., then the area of the full circle is four times this, or:

16π sq. m. * 4 = 64π sq. m.

The area of a circle is pi times the square of the radius, so we can set the area equal to the equation and find the radius:

64π sq. m. = πr²

r² = 64 sq. m.
r = 8 m

So 8 meters is your answer!
here is an example