Supplementary angles, when added, equal 180 degrees
so < A + < B = 180...and if < A = 80
80 + < B = 180
< B = 180 - 80
< B = 100 <==
H + 121 + 31 = 180
H + 152 = 180
H = 180 - 152
H = 28
Answer:
a
Step-by-step explanation:
the five terms for arithmetic is that
Answer and working out attached, hope this helps
