Question

Find each angle measure. see example 3

19. m<1
20. m<2
i honestly have like no idea how to do this and i don’t understand so a simple explanation would be enough

Answer 1

Explanation:

Alternate interior angles are congruent:

m∠1 = 123°

Supplementary angles add up to 180°.

m∠1 + m∠2 = 180°

123° + m∠2 = 180°

m∠2 = 57°