Question

find the sum of the interior angle measures of a convex nonagon (a nine - sided polygon). sum of the interior angle measures = \\(\square\\)°

Explanation:

Step1: Recall polygon angle sum formula

The sum of interior angles of an $n$-sided polygon is $(n-2)\times180^\circ$.

Step2: Substitute $n=9$ (nonagon has 9 sides)

$\text{Sum}=(9-2)\times180^\circ$

Step3: Calculate the result

$\text{Sum}=7\times180^\circ=1260^\circ$

Answer:

$1260$