Question

Find the diameter of a circle whose equation is

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

A)100

B)400

C) 10

D) 20

Answer 1

D) 20

Explanation:

Answer 2

D) 20

Explanation:

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

This can be rewritten as

(x-0)^2 + (y - 2)^2=10^2

This is in the form

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

The radius is 10

The diameter is 2 times the radius

d = 2*r = 2*10 = 20