Education Technology

# Activities

• ##### Subject Area

• Math: Geometry: Perimeter and Area

9-12

45 Minutes

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

TI-Nspire™
TI-Nspire™ CAS

3.9

## Area Formulas

#### Activity Overview

Explore the relationships among the area formulas for parallelogram and rectangles.

#### Objectives

• Students will be able to describe how the area of a parallelogram relates to the area of a rectangle with the same base and height.
• Students will be able to describe how the area of a triangle relates to the area of a parallelogram with the same base and height.
• Students will be able to describe how the area of a trapezoid relates to the area of a parallelogram with the same height and with a base equal to the sum of the bases of the trapezoid.
• Students will be able to use relationships to compute the areas of parallelograms, triangles, and trapezoids given their dimensions.

#### Vocabulary

• rectangle
• parallelogram
• triangle
• trapezoid