Oblicz pole powierzchni całkowitej i objętość figur przedstawionych na ryskunkach: (sześciany)
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a)
d=8cm
d=a√2
8=a√2
a=8/√2=8/√2 * √2/√2=8√2 / 2 =4√2
P=6a²= 6 * (4√2)² = 6 * 18=192
V=a³ = (4√2)³= 128√2
b)
d=6cm
d=a√2
6=a√2
a=6/√2=6/√2 * √2/√2=6√2 / 2 =3√2
P=6a²= 6 * (3√2)² = 6 * 18=108
V=a³ = (3√2)³= 54√2
1]
d=a√2
8cm=a√2
a=8/√2=8√2/2=4√2cm
pole=6a²=6(4√2)²=6×32=192cm³
v=a³=(4√2)³=128√2cm³
2)
D=a√3
6cm=a√3
a=6/√3
a=6√3/3
a=2√3cm
pole=6a²=6(2√3)²=72cm²
v=a³=(2√3)³=24√3cm³
a) d=8cm d=a√2
a√2=8
a=8/√2=8√2/2=4√2
Ppc=6a²
Ppc=6×(4√2)²=6×16×2=192 cm²
V=a³
V=(4√2)³=64×√8=64×2√2=128√2 cm³
b) a²+(a√2)²=6²
a²+2a²=36
3a²=36
a²=12
a=2√3
Ppc=6×a²=6×(2√3)²=6×4×3=72 cm²
V=a³=(2√3)³=8×3=24 cm³