Answer:
-1
Step-by-step explanation:
Two intersecting lines will form 2 pairs of congruent vertical angles. Congruent angles have the same angle measure and vertical angles are opposite angles formed by two intersecting lines. Hope this helps.
Answer:

Step-by-step explanation:
remember: tan(theta) = opposite/adjacent
If you want to find the diameter of a circle multiply the radius by 2
Dh-2