la suma de la longitud de una semicircunferencia y su diametro es 4(pi+2)cm . determine el arrea del circulo

asked Sep 21, 2021 118k views

4 votes

by Farid

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1 vote

Answer:
$16\pi \;cm^2$

Explanation:

La longitud de una semicircunferencia es
$l=\pi r$

$\pi r+2r=4(\pi+2)\\r(\pi+2)=4(\pi+2)\\r = 4(\pi+2)/(\pi+2) \\r=4$

$A = \pi r^2 = \pi (4)^2=16\pi$

Ralph B answered Sep 27, 2021

6.3k points

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