Răspunsuri

2014-09-30T16:08:34+03:00
Aria disc = πr² = π ori raza la patrat

A disc = π*3²=  9  π cm²
1 4 1
Cel mai inteligent răspuns!
2014-09-30T16:09:55+03:00
Arie disc= πR²
Arie disc= 3²π= 9π