What 8.G.C.9 Covers

Grade 8, Geometry, Cluster C (solve real-world and mathematical problems involving volume of cylinders, cones, and spheres). Students know and use the volume formulas for cylinders, cones, and spheres to solve real-world and mathematical problems.

Where It Fits

Builds on Grade 7's volume of right prisms composed of unit cubes. Leads into high school geometry's use of volume formulas for cylinders, pyramids, cones, and spheres in modeling problems. Pairs naturally with 6.G.A.1 (area) and 8.G.B.7 (Pythagorean Theorem) as part of a Grade 6-8 geometry sequence.

Common Mistakes

Forgetting the 1/3 factor in the cone volume formula.
Using the diameter instead of the radius when squaring or cubing in a formula.
Mixing up which formula belongs to which solid (cylinder vs. cone vs. sphere).

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Number of Problems

Standard

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Standard code reference based on the Common Core State Standards Public License. © National Governors Association Center for Best Practices and Council of Chief State School Officers. AlgebraGen's practice problems are our own and are not affiliated with or endorsed by NGA Center or CCSSO.

8.G.C.9 — Volume of Cylinders, Cones & Spheres

What 8.G.C.9 Covers

Where It Fits

Common Mistakes

📐 8.G.C.9 Practice Worksheet Generator

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