A detailed example is used to demonstrate the difference between the commutative and associative properties of addition.

Use this interactive tool to explore cones. Change the height and the radius to see how these affect the cone. There is also the option of making an oblique cone. Properties of a cone are discussed, how to use formulas to calculate the...

Use this interactive tool to explore prisms. Change the height and the shape of the base to see how these affect the prism. There are also several additional options, e.g., making it oblique or transparent. Properties of a prism are...

Use this interactive tool to find the volume of a pyramid. Try different figures for the height and the base to see how these affect the volume. Properties of pyramids are explained, how to calculate the volume using a formula, what an...

This tutorial discusses exterior angles of a triangle. Example problems with explanations are included.

Practice finding equivalent multiplication and division expressions. Numbers in these problems may be negative. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.