Lesson 23, Volume of 3D Solids

Lesson 23, Volume of 3D Solids
Lesson 23, Volume of 3D Solids
Lesson 23, Volume of 3D Solids
Lesson 23, Volume of 3D Solids
Lesson 23, Volume of 3D Solids
Lesson 23, Volume of 3D Solids
Lesson 23, Volume of 3D Solids
Lesson 23, Volume of 3D Solids
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This lesson is the 23rd lesson for the PA Common Core designed to address M08.C-G.3.1.1 (8.G.C.9) . Students should be able to derive the formulas for 3D solids from Area formulas of the base shapes. I teach this by making a table that starts with a Rectangle, Circle, and Triangle (and their area formulas). I add a 3rd dimension and the kids discover that the formula for volume is simply the area formula times the height. I usually use a deck of cards to show "stacked area". Lastly, I use a cone and cylinder of the same height to model how three cones fit into a cylinder. Then, we derive the volume formulas for pyramids and triangular pyramids.
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Teaching Duration
45 minutes
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