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a)Obw=4×4+4×4+4×8=16+16+32=64cm
Pc=4×4×4+4×4×8+4×4×8=64+128+128=320 cm²
b)Obw=4×3+5×7=12+35=47cm
Pc=2×3×7+7×7+2×½×3×3=42+49+9=100cm²
c)Obw=12×2+6×9=24+54=78cm
Pc=6×2×9+18√3=(108+18√3)cm²
14
a)Obw=10×3+4×8=30+32=62cm
V=½×2,6×3×8=31,2cm³
a reszte nie wiem zapomniałam jak sie to liczy