Question

The equation for the circle below is x2 + y2 = 100. what is the length of the circle's radius?

Answer 1

x²+y² =(Radius)²

x²+y² =10². So the radius is 10

Answer 2

Radius of the circle = 10

Explanation:

The equation for the circle below is x2 + y2 = 100.

The equation of a circle in center radius form is

`(x-h)^2 + (y-k)^2 = r^2`

The given equation can be written as

`(x-0)^2 + (y-0)^2 = 100`

from the above equation

r^2 = 100

take square on both sides

r=10