Question

3 lines are shown. A line with points T, R, W intersects with a line with points S, R, V at point R. Another line extends from point R to point U in between angle V R W.
Which pair of angles are vertical angles?

AngleWRU and AngleSRT
AngleWRS and AngleVRT

Answer 1

Angle WRS and Angle VRT.

Explanation: The two intersecting lines give opposite ray pairs (RW opposite RT, and RS opposite RV). Angles WRS (RW & RS) and VRT (RV & RT) use those opposite rays, so they are vertical. Angle WRU uses RU (not on either full line), so WRU and SRT are not vertical.