Question

1. calculate the sum of the interior angles of the figure
2. hannah drew a 20 - sided polygon

Explanation:

Step1: Recall the formula

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

Step2: Substitute the value of $n$

Here, $n = 20$. So, $S=(20 - 2)\times180^{\circ}$.

Step3: Calculate the result

First, $20−2 = 18$. Then, $18\times180^{\circ}=3240^{\circ}$.

Answer:

$3240^{\circ}$