Question

Solve for y.
Answer choices-
A. 115
B. 108
C. 90
D. 130

Answer 1

y = 115

Explanation:

The shape shown in the image is a pentagon.

The sum of interior angles in a pentagon is calculated with the following formula:

(n - 2) × 180 (n is the number of angles)

3 × 180 = 540

Now let's add the given measures:

90 + 135 + y + 88 + 112 = 540

• Add the measures

425 + y = 540

• Subtract 425 from both sides

y = 115°