a To find a pair of opposite rays with given endpoint, find two other points lying on different sides of the endpoint on the same straight line.
B
b Opposite rays are rays that share the same endpoint, but point in opposite directions.
A
aExample Solution: TS, TW
B
bExample Solution: SR, ST
Practice makes perfect
a Opposite rays are rays that share the same endpoint, but point in opposite directions. To find a pair of opposite rays which have T as en endpoint, we have to find two other points lying on different sides of T on the same straight line. Let's take a look at the diagram.
As we can see, points S and W lie on the different sides of T. Therefore, TS and TW are the opposite rays with endpoint T. Notice that this is only an example solution — we could use point R to define a ray.
b To name another pair of opposite rays, we have to change our endpoint and find two points lying on the opposite sides of the new endpoint. Looking at our figure, we can choose S as the new endpoint and R and T to be the two other points. This gives us rays SR and ST.
Notice that this is only an example solution — we could use point W to define a ray.
