Question

Approximately how many degrees are in the measure of an interior angle of a regular seven sided polygon?
102.9
128.6
180.0
231.4

Answer 1

To find the sum of interior angles, the formula is
\[(2n-4)\times90\]
here n=7 so \[((2\times 7)-4)\times90\]\[10\times 90\]900 is the sum of interior angles.
\[900\div7\] because no. of sides.
128.57
Answer B