Answer:
x = 28.3°
Step-by-step explanation:
The polygon above has 7 sides to find x we have to find the sum of it's interior angles which is given by
(n - 2) × 180°
where n is the number of sides
Since it has 7 sides the sum of it's interior angles is
( 7 - 2) × 180 = 5 × 180 = 900°
So we have
x+139+140 + 125 + 116+152 + 2x + 143 = 900
3 x + 815 = 900
3x = 900 - 815
3x = 85
Divide both sides by 3
x = 28.3°
Hope this helps you
