Whats the radius of a circle whose equation is x^2+y^2=16

Question

asked Jan 22, 2021 46.1k views

2 Answers

Impiastro · Answer 1 · 2021-01-26T11:17:53+0000

Answer:

4

Explanation:

We can write the equation of a circle as

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

where (h,k) is the center and r is the radius

x^2 + y^2 = 16

can be rewritten as

(x-0)^2 + (y-0)^2 = 4^2

Where the center is (0,0) and the radius is 4