Demonstrates how to derive the formula for the area of parallelogram based on the area formula for a triangle. [5:42]

Take a look at this tutorial to see how to turn a parallelogram into a rectangle to find the formula for the area. [4:46]

Shows how to find the perimeter of a parallelogram. [1:20]

Explore the formula for the area of a parallelogram and complete the quiz to assess understanding.

Discover how to use the formula for the area of a parallelogram to find the length of the base of a parallelogram by watching this tutorial. [4:08]

Showing that the area of a parallelogram is base times height.

This QuickTime movie explains how to find the area of a parallelogram by developing an area formula and then demonstrates this by showing how to use the area formula. As you watch and listen to the teacher and student interact it helps...

Worked examples of triangles and parallelograms.