Question

Find m/ABC.
Math
80°
19x + 2
B
-2+ 21x
A
B

Answer 1

Answer:

40

Step-by-step explanation:

Exterior angle Theorem: the sum of the 2 farthest angles from the "outside"/exterior angle is equal TO the exterior angle.

So,

80 = (19x + 2) + (-2+21x)

80 = 40x

x = 2

m<ABC = 19(2) + 2 = 40