Answer:
100°, 80°, 100°
Step-by-step explanation:
The figure enclosed by the lines is a parallelogram.
Opposite angles of a parallelogram are always congruent, and consecutive angles are always supplementary.
m∠1 + 80° = 180° (Consecutive angles)
m∠1 = 100°
m∠2 = 80° (Opposite angles)
m∠3 = 100° (Opposite ∠1)
