Question

calcule a área A=π×R^2​

Answer 1

Oie, Td Bom?!

a)

$A = \pi \: . \: r {}^{2}$

$A = 3,14 \: . \: 5 {}^{2}$

$A = 3,14 \: . \: 25$

$A = 78,5 \: cm {}^{2}$

b)

$A = \pi \: . \: r {}^{2}$

$A = 3,14 \: . \: 9 {}^{2}$

$A = 3,14 \: . \: 81$

$A = 254,34 \: cm {}^{2}$

Att. Makaveli1996