Question

I need serious help. Please

Answer 1

By definition of supplementary angles, m<1 + m<2 = 180 (a)
and m<2 + m<3 = 180 (b)
Then, m<1 + m<2 = m<2 + m<3 by definition of supplementary angles (c)
Subtract m<2 from each side. You get m<1 = m<3 (d) or <1 =~ <3 (e)

Answer 2

A is 180 degrees, B is 180 degrees, C is definition of complementary angle, D is 180-angle 2, and E is angle 3.