Question

Question 3 (2 points)

Find the area of a regular octagon with a side length of 12 and an apothem of 30.
1440
2880
180

Answer 1

well, this is an OCTAgon, OCTA = 8.

`\bf \textit{area of a regular polygon}\\\\ A=\cfrac{1}{2}ap~~ \begin{cases} a=apothem\\ p=perimeter\\ \cline{1-1} a=30\\ p=\stackrel{8* 12}{96} \end{cases}\implies A=\cfrac{1}{2}(30)(96)\implies A=1440`