Question

Solve please!!!!!!!!

Answer 1

x = 14

Explanation:

This is a pentagon and there are five sides in a pentagon. All of the sides degrees added together makes 540.

Since the angles are the same and the average angle of every pentagon is 108, then 9x - 18 = 108.

108 + 18 = 126

9x = 126

9x/9 = 126/9

x = 14

Answer 2

x=14

Explanation:

This shape is a pentagon, as it has 5 sides. The formula to find the sum of the interior angles of a polygon is:

(n-2)*180

In this case n represents the number of sides. We can plug 5 into the equation to get...

(5-2)*180=3*180=540

Since all sides are equal, all angles are equal too therefore one angle is equivalent to...

540/5=108

This means...

9x-18=108

Add 18 to both sides

9x-18+18=108+18

9x=126

Divide both sides by 9

x=14