The equation of a circle centered at the origin is x^2+y^2=64.what is the radius of the circle? A.32 B.8 C.4 D.64

asked Jul 7, 2018 33.8k views

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The equation of a circle centered at the origin is x^2+y^2=64.what is the radius of the circle?

A.32
B.8
C.4
D.64

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4 votes

Answer: The radius is 8

Step-by-step explanation:

Amir Rahbaran answered Jul 10, 2018

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2 votes

EQUATION OF A CIRCLE = (x-h)² + (y-k)² =r²

In this case, since the center of the cercle is in O, then h=0 & k=0

x²+y² = 64

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