Răspunsuri

2014-05-11T17:43:42+03:00
A totala= 2(ab+ac+bc)
A= 2( 8 x 20 + 8 x 8,5 + 20 x 8,5)
A= 2( 160 + 68 + 170)
A= 2 x 398
A= 796 cm patrati
V= L x l x h
V= 8 x 20 x 8,5
V= 1360 cm cubi= 1,36 dm cubi
2 3 2
2014-05-11T17:47:38+03:00
At=2(L*l+L*h+h*l)
=2(8*20+8*8,5+20*8,5)
=2(160+68+170)
=2*398=796

V=L*l*h
=8*8,5*20
=1360
2 4 2