## Geometry: Common Core (15th Edition)

$m \angle 1 = 101^{\circ}$ $m \angle 2 = 79^{\circ}$ $m \angle 3 = 101^{\circ}$
Consecutive angles in a parallelogram are supplementary; therefore, $\angle 1$ and $\angle 3$ are supplementary to the angle that measures $79^{\circ}$. Let's find the measures of $\angle 1$ and $\angle 3$: $m \angle 1 = m \angle 3 = 180 - 79$ Subtract to solve: $m \angle 1 = m \angle 3 = 101^{\circ}$ Opposite angles in a parallelogram are congruent; therefore, $m \angle 2 = 79^{\circ}$.