Answer:
the formula for the sum of the interior angles of a polygon, which is given by (n-2) * 180 degrees, where n is the number of sides of the polygon. In the case of a heptagon, which has 7 sides, the sum of the interior angles is (7-2) * 180 = 5 * 180 = 900 degrees.
We are told that the sum of all but one of the interior angles is 776 degrees. To find the measure of the final interior angle, we need to subtract the sum of the other interior angles from the total sum of the interior angles.
The sum of the other interior angles is therefore 900 - 776 = 124 degrees.
Therefore, the measurement of the final interior angle of the heptagon is 124 degrees.
Explanation: