Answer:
80°
Step-by-step explanation:
20°+80°+missing angle=180°
missing angle=180°-100°=80°
0 -1-(-8)
0-1=-1
-1-(-8)
-1+8
=7
90°
x + 37 + 53 = 180 (ANGLE SUM PROPERTY)
x + 90 = 180
x = 180-90
x = <u>90°</u>
no
