SOLUTION: Analytic Geometry Find the diameter and the area of the circle defined by x^2+y^2=64.

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Analytic Geometry Find the diameter and the area of the circle defined by x^2+y^2=64.      Log On


   

Question 177781: Analytic Geometry
Find the diameter and the area of the circle defined by x^2+y^2=64.
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2%2By%5E2=64
we know from this equation that the circle has a radius of 8
:
D=2%28pi%29r=2%28pi%298=16%28pi%29
:
a=%28pi%29r%5E2=%28pi%29%288%29%5E2=64%28pi%29