Which solid has more volume? Show work as evidence.

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Presentation transcript:

Which solid has more volume? Show work as evidence. Warm up Which solid has more volume? Show work as evidence. The cylinder has more volume.

Skills Check

Bonaventura Cavalieri 1598 – 1647 Italian mathematician Known for his work on the problems of: Optics Motion Calculus Introduction of logarithms

Cavalieri’s Principle The volumes of two objects are equal if the areas of their corresponding cross sections are equal

Cavalieri’s Principle Examples These pieces maintain their SAME volume regardless of how they are moved.

Cavalieri’s Principle Examples

Cavalieri’s Principle Examples The same volume formula applies whether it’s a right prism or an oblique prism. V = Bh

Example 1: Which solid has more volume? Use Cavalieri’s Principle. The area of the cross sections are both 24in2 and have the same height of 20, so the solids have the SAME volume.

Example 2: Which solid has more volume? Use Cavalieri’s Principle. 6 cm 10 cm The area of the cross sections are both 36cm2 and have the same height of 10, so the solids have the SAME volume.

3. Find the volume to the nearest tenth.

4. Find the volume to the nearest tenth.

Homework CW Time!