x 2 + y 2 = 20
This is the form of a circle. Use this form to determine the center and radius of the circle.
( x − h ) 2 + ( y − k ) 2 = r 2
Match the values in this circle to those of the standard form. The variable r represents the radius of the circle, h represents the x-offset from the origin, and k represents the y-offset from origin.
r = 2 √ 5
h = 0
k = 0
The center of the circle is found at ( h , k )
. Center: ( 0 , 0 )
These values represent the important values for graphing and analyzing a circle.
Center: ( 0 , 0 )
Radius: 2 √ 5