Răspunsuri

2014-07-20T11:35:43+03:00
2014-07-20T11:52:35+03:00
L cerc= 2πR
Diametru= 2R
R= Lungime cerc supra 2π
Diametru= Lungime/π
Diametru= 90 cm/π (/= supra)