Question

Question 1 of 25

This circle is centered at the origin, and the length of its radius is 8. What is
the equation of the circle?
-10
10+
-10+
OA-1
A.
10
OB. x² + y² = 8
OC. x² + y² = 82
OD. (x-8)2 + (y-8)² = 64

Answer 1

x² + y² = 64

Explanation:

the equation of a circle centred at the origin is

x² + y² = r² ( r is the radius ) , then

x² + y² = 8² , that is

x² + y² = 64 ← equation of circle