Education Technology

# Activities

• ##### Subject Area

• Math: Middle Grades Math: Geometry

6-8

45 Minutes

• ##### Device
• TI-73 Explorer™
• TI-Navigator™
• ##### Software

LearningCheck™ Creator
TI Connect™

## Dividing Up The Area

#### Activity Overview

In this activity, students investigate the relationship between the area of quadrilaterals and triangles using the Geoboard application. As an extension, students will find the area of a complex figure.

#### Key Steps

• Students will use the Geoboard app to compare the areas of squares and rectangles to the area of the triangles that divide each of them. They are to determine a formula for the area of a triangle based on what they know about the formula of a rectangle.

• Then students will compare parallelograms and rectangles that have the same area to determine the relationship between the two quadrilaterals.

• As an extension, students will use what they have learned in the activity to find the area of complex figures.