Question

what expression could be used to calculate one interior angle of a heptagon?
(7 - 2)180 / 7
not enough information. we must know if the polygon is regular to proceed.
(5 - 2)180
(7 - 2)180

Explanation:

Step1: Recall polygon - sum formula

The sum of interior angles of a polygon is given by $(n - 2)\times180^{\circ}$, where $n$ is the number of sides. For a heptagon, $n = 7$, so the sum of interior angles is $(7 - 2)\times180^{\circ}$.

Step2: Find one interior angle of a regular polygon

To find one interior angle of a regular polygon, we divide the sum of interior angles by the number of sides $n$. For a heptagon, one interior angle is $\frac{(7 - 2)\times180}{7}$.

Answer:

A. $\frac{(7 - 2)180}{7}$