Question

a shape with no straight sides and defined by a center and radius is a

the distance from the center of a circle to any point on its edge is called the

Explanation:

For the first blank, a circle is a shape with no straight sides and is defined by a center and radius. For the second blank, by the definition of radius in a circle, the distance from the center of a circle to any point on its edge is called the radius.

Answer:

circle
radius