Lesson 2: Angles and Triangles
Angle A and B are supplementary.
If angle A is equal to 20 degrees and angle B is equal to 2x +10, what is the value of x?
Supplementary Angles Photo.PNG
(1 point)
Group of answer choices
x= 75
x= 90
x =160
x= 180
Since the angles are supplementary, their sum must be 180 degrees.
20 + 2x + 10 = 180
2x + 30 = 180
2x = 150
x = 75
Therefore, the value of x is 75.
So, the correct answer is x = 75.