## Lesson: Area Formulas

Developing the Concept

Now that students know the formula for the area of a triangle, it's time to build on that knowledge to develop a formula for the area of a parallelogram.

**Materials:** Overhead transparency, an activity sheet with six parallelograms on it with base and height measures given for four of the parallelograms, rulers for students to use

**Preparation:** Draw a parallelogram on an overhead transparency.