Question

cum se calculeaza aria sferei??

si daca o sfera are raza 3, volumul e egal cu??​

Answer 1

r= 3

A= 4πr²= 4•π•3²= 4•π•9= 36π cm²

V= 4πr³/3= 4•π•3³/3= 4•π•27/3= 108π/3= 36π cm³

Answer 2

Usor

1. Aria sferei=
2. $4\pi \:r ^{2}$
3. raza e trei atunci volumul are formula : 4 pi R^3/3

4 pi *3^3/3

4 pi*27/3

4 pi *9

V=36 pi cm^3