Question

Ajutati-ma dau coroana

Answer 1

A=pi × R^2

L=2pi×R

a) A=pi×8^2=> A=64pi cm^2

L=2pi×R => L=2pi×8 => L= 16pi cm

b)A=3V3pi^2 => A=27pi cm^2

L=2pi×3V3 => L= 6V3pi cm

c)A=2V7pi^2 => A=28pi cm^2

L=2pi×2V7=> L= 4V7pi cm

d)A=11pi^2 => A=121pi cm^2

L=2pi×11 => L=22pi cm

^(la putere)

V (radical)