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un paralelipiped dreptunghic ABCDA'B'C'D' are AD=AA'=8cm CD=8radical2 cm. calculati: aria totala
volumul
diagonala


Răspuns :

Atotala=2(8*8+8√2*8+8√2*8)=2(64+64√2+64√2)=2(64+128√2)=
=128(1+2√2)≈490,04 cm²
V=8*8*8√2=512√2 cm³
diagonala=√(8²+8²+(8√2)²]=√(64+64+128)=√256=16 cm