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Triangle areaA = ½ · b · h
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Triangle area

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Circle areaA = π · r²
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Circle area

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Circle circumferenceO = 2 · π · r
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Circle circumference

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Rectangle areaA = l · b
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Rectangle area

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Cube volumeV = a³
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Cube volume

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Cylinder volumeV = π · r² · h
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Cylinder volume

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