Answer:
x = 127
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, thus
sum = 180° × 4 = 720°
Sum the interior angles and equate to 720 for x
120 + 100 + 128 + 133 + 112 + x = 720, that is
593 + x = 720 ( subtract 593 from both sides )
x = 127
