Answer:
1 - Circle 2 - Concentric 3 - Congruent 4 - Diameter 5 - Radius
Step-by-step explanation:
1. the set of all points in a plane that are at a given distance from a given point in the plane
Circle
2. two or more circles that lie in the same plane and have the same center
Concentric Circles
3. circles that have equal radii
Congruent Circles
4. a chord of a circle that contains the center of the circle
Diameter
5. a segment joining the center of a circle to a point of the circle
Radius