Question

match the definitions to the mathematical terms they describe. all coplanar points equidistant from a given point piece of a line with two endpoints two rays with a common endpoint piece of a line with one endpoint line segment angle circle ray

Explanation:

1. The set of all coplanar points equidistant from a given point is the definition of a circle.
2. A piece of a line with two endpoints is a line - segment.
3. Two rays with a common endpoint form an angle.
4. A piece of a line with one endpoint is a ray.

Answer:

"all coplanar points equidistant from a given point" -> circle
"piece of a line with two endpoints" -> line segment
"two rays with a common endpoint" -> angle
"piece of a line with one endpoint" -> ray