What is M A ?
A. 42
B. 50
C. 58
D. 100
I think its a or c not sure tho

Answer:
Angle A = 58
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the opposite interior angles
? + 80 = 138
Subtract 80 from each side
? + 80-80 =138 - 80
? = 58
Angle A = 58
Answer:
THE ANSWER IS 58
Step-by-step explanation:
HOPE IT HELPS:)