Answer:
∠1= 109°, ∠2=71°, ∠3=109°, ∠4=71°
Explanation:
Angles 4 and 2 are vertical angles therefore are congruent and have equal measure; because is given m∠4=71° then m∠2 = 71°
Angle 4 and 3 are a linear pair so m∠4+m∠3 =180° so m∠3 = 180 -71 =109°
Angles 1 and 3 are vertical angles therefore are congruent and have equal measure; because we found that m∠3=109° then m∠1 = 109°