Respuesta :
Answer:
124°
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 ( heptagon has 7 sides ) , then
sum = 180° × 5 = 900°
let x be the final interior angle , then
776° + x = 900° ( subtract 776° from both sides )
x = 124°
