Which basic geometric term can be called "half of a line"? a. ray b. vertex c. segment d. angle

 A. Ray

Step-by-step explanation:

A ray is a part of a line that starts at a fixed point and goes towards in a particular direction to infinity where as a line has no endpoints such that it goes towards infinity from both the sides.

The point where the ray begins is known as its endpoint.

Similarly as a line, ray passes through infinite points on its way in a particular direction .

Thus, the basic geometric term can be called "half of a line" is ray.

6, 10

9, -13

12, -21

18, -23

step-by-step explanation:

you just add 6 to the x-coordinate and subtract 10 from the y-coordinate.