Question

6 A pair of adjacent angles is formed by lines

AD and CE.
What is the measure of angle ABC?
F 145°
G 217
H 85°
J Not here

Answer 1

x° = 145°

Explanation:

x° + (2x - 255)° = 180°

3x = 180 + 255

3x = 435

x° = 145°