Mathematics: Find the area of the regular decagon if the apothem is 2.8ft and a side is 1.8ft

Find the area of the regular decagon if the apothem

Ответ:

Easton777

14.03.2022

DECA=10, decagon = 10 sides.

since each side is 1.8 long, all 10 sides will be 10*1.8 or 18 units long, so that'd be the perimeter then,

$\bf \textit{area of a regular polygon}\\\\
A=\cfrac{1}{2}ap~~
\begin{cases}
a=apothem\\
p=perimeter\\
------\\
a=2.8\\
p=18
\end{cases}\implies A=\cfrac{1}{2}(2.8)(18)$

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Ответ:

edjiejwi

24.03.2021

Mathematics

i.dk

Step-by-step explanation:

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Find the area of the regular decagon if the apothem is 2.8ft and a side is 1.8ft

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