Question

Solving for Exterior Angle Measures
What is the measure of ∠ABD?

Answer 1

114 is correct !

Explanation:

I got this problem right on my assignment.

Answer 2

(4n + 6)° = (2n)° + 60° [since external angle is equal to sum of two internal angles]

(4n + 6)° = (2n)° + 60°
4n - 2n = 60 - 6
2n = 54
n = 27

Since n = 27 and ∡ ABD = (4n + 6)°

∡ ABD = [4(27) + 6]°
= (108 + 6) °
= 114°