Answer:
105°
Explanation:
You want the measure of the remaining angles of a pentagon if one of the angles is 120° and the remaining angles are congruent to each other.
Pentagon
The sum of the interior angles of a pentagon is 180* × (5 -2) = 540°. If one of the angles is 120°, the sum of the other four is ...
540° -120° = 420°
Then each of those four congruent angles has a measure of ...
420°/4 = 105°
The size of the other angles is 105°.