Answer:
x = 150
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
Here n = 6 , then
sum = 180° × 4 = 720°
Sum the given interior angles and equate to 720, that is
130 + 90 + 120 + 112 + 118 + x = 720, simplifying
570 + x = 720 ( subtract 570 from both sides )
x = 150
