Graph of a circle with radius 5 centered at the origin, showing key points and a right triangle.
A graph of a circle centered at the origin with radius 5, passing through points (5,0), (0,5), (-5,0), (0,-5), (4,3), (-4,3), (4,-3), and (-4,-3), with a right triangle formed by the radius to (4,3) and the x and y axes.