Give the equation of the circle centered at the origin with radius 8

Question

Writing the equation of a circle centered at the origin given its radius or a point on the circle

Answer 1

(x - h)²  + (y - k)² = r²

 

(h,k) is the center

 

(x - 0)² + (y - 0)² = 8²

x² + y² = 64