Find the measure of angle A.
x + 47
780
x + 61
A) 31°
B) 44°
C) 51°

Answer:
180 degrees in a triangle
180 - 78 - 47- 61 = -6
2X = -6
-6/2 = -3
-3 + 47 = 44
-3+61= 58
78 + 58 + 44= 180
A = 44 degrees