Question

look at this diagram: if (overleftrightarrow{jl}) and (overleftrightarrow{mo}) are parallel lines and (mangle lkn = 121^{circ}), what is (mangle onp?)

Explanation:

Step1: Identify angle - relationship

$\angle LKN$ and $\angle ONP$ are vertical angles.

Step2: Recall vertical - angle property

Vertical angles are congruent. So $m\angle ONP=m\angle LKN$.

Answer:

$121$