Lesson: Volumes of Cones Mathematics • 8th Grade

In this lesson, we will learn how to calculate volumes of cones and solve problems including real-life situations.

Lesson Plan

Objectives

Students will be able to

  • recall the formula for the volume of a cone,
  • find the volume of a cone with known side lengths and radius (slant height or perpendicular height given),
  • find the volume of a cone where the area of the base is given and the perpendicular height can be calculated,
  • calculate a missing length of a cone when given its volume,
  • use knowledge of the volume of a cone to solve problems presented as real-life systems.

Prerequisites

Students should already be familiar with

  • slant height and perpendicular height of a cone,
  • right cones,
  • the Pythagorean theorem.

Exclusions

Students will not cover

  • oblique cones,
  • pyramids,
  • the surface area of a cone.

Lesson Video

Video Thumbnail
16:35

Lesson Explainer

Sample Question Videos

  • 02:12
  • 02:53
  • 02:44

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