Question

which is the endpoint of a ray? ○ point r ○ point s ○ point t ○ point u

Explanation:

A ray has one endpoint and extends infinitely in one direction. Looking at the diagram, rays like SR (going up from S), ST (going right from S), and SU (going towards U from S) all start at point S. So S is the endpoint for these rays.

Answer:

point S