Find the center-radius form of the equation of the circle.
-center $( 0,0 )$, radius 7
A) $x ^ { 2 } + y ^ { 2 } = \sqrt { 7 }$
B) $x ^ { 2 } + y ^ { 2 } = 14$
C) $x ^ { 2 } + y ^ { 2 } = 49$
D) $x ^ { 2 } + y ^ { 2 } = 7$

Question

Quizplus · Accepted Answer

The center-radius form of a circle's equation is $x^2 + y^2 = r^2$, where $r$ is the radius. Given a radius of 7, $r^2 = 7^2 = 49$, so the correct equation is $x^2 + y^2 = 49$.

Find the Center-Radius Form of the Equation of the Circle (0,0)( 0,0 )(0,0)

Find the Center-Radius Form of the Equation of the Circle $( 0,0 )$