Looks Right

Author

Jean-Marie Laborde and Frank Bellemain

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Geometry: Similarity and Proportion

Math: Geometry: Triangles

Level

9-12

Activity Time

15 Minutes

Resource Types

Lessons

Report an Issue

Looks Right

Activity Overview

Students use the Cabri Geometry II Plus software to determine which given triangle retains its basic shape after its vertices are dragged around the screen.

Before the Activity

Download the Cabri Geometry™ software on the computer

See the attached FIG file for details of this activity

During the Activity

Follow the Activity procedure:

Drag the vertices of the first triangle (figure A) around the screen

Observe that along with the angles, the shape also changes

Drag the vertices of the second triangle (figure B) around the screen

Notice that the size of the triangle changes, but segment GD is always perpendicular to segment DE

After the Activity

Review student results:

As a class, discuss questions that appeared to be more challenging

Re-teach concepts as necessary

Download Files

Download All Files (ZIP)

Before the Activity Files

CabriGeo_II_Plus_Act03.fig

Author

Jean-Marie Laborde and Frank Bellemain

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Geometry: Similarity and Proportion

Math: Geometry: Triangles

Level

9-12

Activity Time

15 Minutes

Resource Types

Lessons

Report an Issue

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Vernier EasyData,Vernier EasyLink and Vernier EasyTemp are registered trademarks of Vernier Science Education.

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