= (πr2) ⋅ H
Pyram id |
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Introduce the general formula for finding the volume of a pyramid. |
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Volum epyramid = A ⋅ H |
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Ask students to identify the difference between this general formula and the one | ||||||||
for the prism. (There is one more variable: .) If students remember a | ||||||||
volume formula for a prism, it is easy to |
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remember the volume formula for |
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a pyramid with the |
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height: simply multiply by . You |
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can demonstrate this concept by pouring |
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three filled pyramids into the | w |
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corresponding prism in the Geometric |
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Shapes set. |
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S quare Pyrami d |
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Volum esquare pyramid = A ⋅ H |
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= (l ⋅ w) ⋅ H |
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b h |
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Triangul ar Py ramid | = A ⋅ H | ||
Volum etriangular pyramid | |||
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Cone | H |
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Volum econe = A ⋅ | H |
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= (πr2) ⋅ |
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H
S phere
Volum esphere = πr3
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7
