Question

ex 9, urgent, Vă rog

Answer 1

a) A=$l^{2}$, l=$\sqrt{A}$=$\sqrt{16}$=4cm
V=$l^{3}$=64$cm^{3}$
b) P=4xl, l=P/4=20/4=5dm
V=$l^{3}$=125$dm^{3}$
c) cubul are 12 muchii de lungimi egale l=36/12=3cm
V=$l^{3}$=27$cm^{3}$
d) cubul ara 6 fete de arii egale A=$l^{2}$/6=24/6=4$dm^{2}$
l=$\sqrt{4}$=2dm
V=$l^{3}$=8$dm^{3}$