Question

The sum of all but one interior angle of a heptagon is 776°. The final angle must have a measure of _____ degrees?

Answer 1

A heptagon has 7 sides.

Note that the sum of angles in an n-sided polygon is 180(n-2 degrees.
Therefore, the sum of the angles is
180(7-2) = 900°.

Six of the angles sum to 776°.
The remaining angle is
900 - 776 = 124°

Answer: 124°

Answer 2

Answer:

124 degrees

Step-by-step explanation: