This mini-lesson explores the area of a circle. Provides a definition, examples, and practice questions with answers.

This CoolMath resource provides an introduction to some Precalculus formulas.

This site from the Math Forum defines both a circular cylinder and a right circular cylinder. Pictures of each are provided. Formulas are provided.

Use this online calculator to calculate the volume of geometric solids including a capsule, cone, frustum, cube, cylinder, hemisphere, pyramid, rectangular prism, sphere, and spherical cap.