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Pp=8²=64cm²
Pśb=8×12=96cm²
4×96=384cm²
Pc=64+384=448cm²
4√2²+h²=12²
h²=112/√
h=4√7cm
V=64×4√7/3=256√7/3
V=85√7cm³
z1.
Pp= 9²√3/4
Pp=81√3/4
V=81√3/4×10/3
202,5√3/3