Question

what expression could be used to calculate the sum of the interior angles of a 13 - gon?
(11 - 2)180
(13 - 2)180
not enough information. we must know if the polygon is regular to proceed.
\frac{(13 - 2)180}{13}

Explanation:

Step1: Recall the formula

The formula for the sum of interior - angles of a polygon is $(n - 2)\times180^{\circ}$, where $n$ is the number of sides of the polygon.

Step2: Identify the number of sides

For a 13 - gon, $n = 13$.

Step3: Substitute the value of $n$

Substituting $n = 13$ into the formula, we get $(13 - 2)\times180$. The sum of interior angles of a polygon can be found using this formula regardless of whether the polygon is regular or not.

Answer:

B. $(13 - 2)180$