Respuesta :

Answer:

Step-by-step explanation:

the radius for a circle √(64) = 8

answer is A

Answer:

A

Step-by-step 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 r² = 64 ( take square root of both sides )

r = [tex]\sqrt{64}[/tex] = 8