Question

look at this diagram: if $overleftrightarrow{oq}$ and $overleftrightarrow{rt}$ are parallel lines and $mangle rsp = 115^{circ}$, what is $mangle tsu$?

Explanation:

Step1: Identify angle - relationship

$\angle RSP$ and $\angle TSU$ are vertical angles.

Step2: Recall vertical - angle property

Vertical angles are congruent. So $m\angle TSU=m\angle RSP$.

Answer:

$115$