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dedylja [7]
3 years ago
15

Find the area of a regular pentagon with side equal to 3 and apothem equal to K

Mathematics
2 answers:
viva [34]3 years ago
7 0

a regular polygon has all equal sides.


a PENTA=5, pentagon has 5 sides, so a regular pentagon has 5 equal sides.


\bf \textit{area of a polygon}\\\\ A=\cfrac{1}{2}ap~~ \begin{cases} a=apothem\\ p=perimeter\\[-0.5em] \hrulefill\\ a=K\\ p=\stackrel{3+3+3+3+3}{15} \end{cases}\implies A=\cfrac{1}{2}K15\implies A=\cfrac{15}{2}K

goblinko [34]3 years ago
4 0

The answer is 7.5K :)

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