## Algebra 1

$30 ^\circ$
Consider $p$ be the measure of the angle with equal measure for two angles. Thus, $120 ^\circ +p+p=180 ^\circ$ $120 ^\circ +2p=180 ^\circ$ $2p=180 ^\circ-120 ^\circ$ $2p=60^\circ$ $p=30 ^\circ$