Understand Angle Transformation Properties Practice Test

Only right angles stay the same after reflection, so these angles must change.

$\angle 1' = 70^\circ$ and $\angle 2' = 110^\circ$, so they are no longer supplementary.

$\angle 1' = 110^\circ$ and $\angle 2' = 70^\circ$, so they are still supplementary.

$\angle 1' = 180^\circ$ and $\angle 2' = 0^\circ$ after reflection.