70cm=0,7cm
51cm=0,51m
42cm=0,42m
Pc = 2ab+2ac+2bc = 2*0,7*0,51+2*0,7*0,42*2*0,51*o,42 = 0,714+0,588+0,4284=1,7304m2
Pp=70*42=2940cm2=29,4dm2
Pb2=2*42*51=4284cm2=42,84dm2
Pc=29,4+42,84=72,24dm2
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70cm=0,7cm
51cm=0,51m
42cm=0,42m
Pc = 2ab+2ac+2bc = 2*0,7*0,51+2*0,7*0,42*2*0,51*o,42 = 0,714+0,588+0,4284=1,7304m2
Pp=70*42=2940cm2=29,4dm2
Pb2=2*42*51=4284cm2=42,84dm2
Pc=29,4+42,84=72,24dm2