Question

Determine the sum of the measure of the interior angle of the specified polygon (octagon)A/720B/900C/1080D/1440

Answer 1

Solution:

The sum of interior angles of a polygon is calculated using the formula below

$=(n-2)\times180$

Since the polygon is an octagon,

$n=8$

By substituting the values, we will have

$\begin{gathered} (n-2)\times180 \\ (8-2)\times180 \\ =6\times180 \\ =1080^0 \end{gathered}$

Hence,

The final answer is

$\Rightarrow1080^0$

OPTION C is the right answer