Answer:
x = 134°
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 = 7, thus
sum = 180° × 5 = 900°
Sum the interior angles and equate to 900
x + 126 + 128 + 132 + 123 + 132 + 125 = 900, that is
x + 766 = 900 ( subtract 766 from both sides )
x = 134°
