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Version 11.1 von Bastian Knöpfle am 2026/02/03 10:58
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Bastian Knöpfle 1.1 1 Würfel:
Bastian Knöpfle 4.1 2 {{formula}}V=a^3=1000 \mathrm{cm}^3 \Rightarrow a=10\mathrm{cm}{{/formula}}
Bastian Knöpfle 5.1 3 {{formula}}O=6 \cdot a^2=600\mathrm{cm}^2{{/formula}}
Bastian Knöpfle 1.1 4 Kugel:
Bastian Knöpfle 11.1 5 {{formula}}V=\frac{4}{3} \cdot \pi r^3 =1000 \mathrm{cm}^3 \Rightarrow r=\sqrt[3]{\frac{3V}{4 \pi}} =\sqrt[3]{\frac{3 \cdot 1000}{4 \pi}} =6,2 \mathrm{cm} {{/formula}}
Bastian Knöpfle 7.1 6 {{formula}}O=4 \pi \cdot r^2 = 4 \pi (6,2 \mathrm{cm})^2 =483 \mathrm{cm}^2 {{/formula}}
Bastian Knöpfle 5.1 7 Zyliner:
Bastian Knöpfle 8.1 8 {{formula}}V=\pi \cdot r^2 \cdot h \quad \text{mit} \quad h=2r {{/formula}}
Bastian Knöpfle 11.1 9 {{formula}} V=2 \pi r^3{{/formula}}
10 {{formula}} r=\sqrt[3]{\frac{V}{2 \pi}}=\sqrt[3]{\frac{1000}{2 \pi}}=5,42\mathrm{cm}{{/formula}}
11
12 {{formula}} O=2 \pi \cdot r^2+2\pi \cdot r \cdot h \quad \text{mit} \quad h=2r {{/formula}}
13 {{formula}} O=2 \pi \cdot r^2+2\pi \cdot r \cdot 2r {{/formula}}
14 {{formula}} O=2 \pi \cdot r^2+4\pi \cdot r^2 {{/formula}}
15 {{formula}} O=2 \pi \cdot (5,42\mathrm{cm})^2+4\pi \cdot (5,42\mathrm{cm})^2=553,6 \mathrm{cm}^2 {{/formula}}