Answer:
1)Another name for the endpoint of a ray is initial point.
2)1 point only .
Explanation:
Given : ray.
To find : another name for the endpoint of a ray and how many points are needed to define a ray.
Solution : We have given ray
Ray : A ray is a part of a line that has one endpoint and goes on infinitely in only one direction.
Example : ·→→→→ sun ray .
Another name for the endpoint of a ray is initial point.
and we need to define only one point to define ray that is only starting point.
Therefore, 1)Another name for the endpoint of a ray is initial point.
2)1 point only .