Question

The equation for the circle shown below is x2 + y2 = 64 What is the length of the circles radius

Answer 1

radius = 8

Explanation:

the equation of a circle centred at the origin is

x² + y² = r² ( r is the radius )

x² + y² = 64 ← is in this form

with r =
`√(64)` = 8