Education Technology

# Activities

• ##### Subject Area

• Math: Geometry: Perimeter and Area

9-12

45 Minutes

• ##### Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™
• TI-Nspire™ CAS
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

3.2

## Side Length, Perimeter, and Area of a Rectangle

#### Activity Overview

Explore the effects of changing base (or height) of a rectangle on it's perimeter and area.

#### Objectives

• Explain how a change in only the base (or the height) of a rectangle affects its perimeter
• Explain how a change in only the base (or the height) of a rectangle affects its area

• base
• height
• perimeter
• area

#### About the Lesson

In this lesson, students will change the base of a rectangle and observe the corresponding changes in the perimeter and area. They will also change the height of a rectangle and observe the corresponding changes in the perimeter and area. As a result. students will:

• Generalize the effect on perimeter when the base (or height) is increased by n units.
• Generalize the effect on area when the base (or height) is increased by n units.