Answer and Explanation:
Angles RDY and NDA are both right angles; their measures are both 90°.
This means that:
- they are supplementary because their measures add to 180°, which is the definition of supplementary angles
- they are a linear pair because they are supplementary and adjacent (next to each other)
They are NOT vertical angles because they are not on opposite angles of an intersection. They are NOT complementary because their measures don't add to 90°.