How to solve for n if the interior angle of the regular n-gon has a measure of 177.6?

The answer is found by finding one of the exterior angles.
The interior angle + the exterior angle = 180o (They are supplementary.)
x + 177.6 = 180
x = 180 - 177.6
x = 2.4 degrees.

In a regular polygon, all of the exterior angles add up to 360 degrees.
n * 2.4 = 360
n = 360 / 2.4
n = 150 sides <<<<answer

−3x−2y−1

Step-by-step explanation:

1. Remove parentheses.

−x−y−2x−y−1

2. Collect like terms.

(−x−2x)+(−y−y)−1

3. Simplify.

−3x−2y−1