Education Technology

# Activities

• ##### Subject Area

• Math: Geometry: Similarity and Proportion

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

4.0

## Triangle Midsegments

#### Activity Overview

Investigate the relationships between a triangle and the similar triangle formed by one of the triangle's midsegments.

#### Objectives

• Capture the lengths of a triangle midsegment and the side of the triangle not connected to it
• Analyze the relationship between the lengths using a formula in the spreadsheet
• Measure areas and define them as variables
• Investigate relationships for the measurement data with a spreadsheet

#### Vocabulary

• similarity
• similar triangles
• midsegment

#### About the Lesson

• This “create your own” activity is designed for students to work independently or with a partner to complete this lesson. The time varies for this activity depending on whether the TI-Nspire document (.tns file) is provided or created by the students.