Education Technology

Similarity and Dilations

Subject Area
Math: Geometry: Similarity and Proportion
Level
9-12
Activity Time
50 Minutes
Software
TI Connect™
TI Calculator
TI-89 / TI-89 Titanium
Resource Types
Lessons

Similarity and Dilations

Activity Overview

Students will discover properties of similar figures using the TI-89 and CABRI Geometry II to use dilations to dynamically manipulate figures. (Topic - Similar Figures and the Role of Dilations)

Before the Activity

Students should have access to the TI-89/TI-89 Titanium.

During the Activity

Students will use the TI-89 and CABRI™ Geometry to use dilations to dynamically manipulate figures in order to discover properties of similar figures. This activity may be teacher directed or discovery.

After the Activity

Review student results:

  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary
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    Subject Area
    Math: Geometry: Similarity and Proportion
    Level
    9-12
    Activity Time
    50 Minutes
    Software
    TI Connect™
    TI Calculator
    TI-89 / TI-89 Titanium
    Resource Types
    Lessons
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