Question

How do you find the radius of a circle

Answer 1

Area = 2 pi r.

area/2 pi = r

Answer 2

In equation of a circle, \[x^2+y^2=c^2,\]c is the radius.

Answer 3

It depends on the context of the question.

Answer 4

I generally try to use magic, a ruler, or if I know the area, circumference, diameter then I use some math.

Answer 5

Or try to find it in the question! ;)

Answer 6

Formula for the area of a circle:

A = pi * r^2 (this formula is used when u knw about the area )