Question

Daca un con circular derp are R=8cm si Al=80ĪĪ cm atunci
G= cm h= ?
At= cm V= ?

Answer 1

Răspuns:

-Al=piRG=pi8•G=80pi cm patrati,de unde rezulta ca G=10

-G la a 2a=R la a 2a+H la a 2a

100=64+H la a 2a

H la a 2a=36, de unde rezulta ca H=6cm

-At=piR(G+R)=pi8•18=144 pi cm patrati

-V=piR la a 2a•H/3=pi64•6/3=64pi•2=128 pi cm cubi