Question

Two lines extend from point S to create a right angle. The vertical line extends from point S through point R. The horizontal line extends right from point S through point T. A third line extends right and up from point S through point U.
Which is the endpoint of a ray?

point R
point S
point T
point U

Answer 1

point S

Explanation: A ray has one endpoint and extends infinitely in one direction. Each ray shown starts at S and goes through R, T, or U, so S is the endpoint.