# Lesson Plan: Volumes of Spheres Mathematics • 8th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find volumes of spheres and solve problems including real-life situations.

#### Objectives

Students will be able to

- recall the formula for the volume of a sphere,
- use the formula for the volume of a sphere to find the volume of a sphere given its radius (or diameter) and vice versa,
- understand the relationship between the great circle and a sphere and how to calculate the volume of a sphere given information about its great circle,
- find the volume of a hemisphere or of other fractions of a sphere,
- solve real-world problems involving volumes of spheres.

#### Prerequisites

Students should already be familiar with

- calculating areas and circumferences of circles and of fractions of circles,
- real numbers and operations on them.

#### Exclusions

Students will not cover

- surface areas, including those of spheres,
- volumes of cones.