Activities

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- Download All Files (ZIP)
- Before the Activity Files
- Inscribed Angles.doc
Alignment
- Standards Alignment
- Textbook Alignment
Subject Area
- Maths: Geometry: Circles
Author

Stephanie MacKay
Level

9-12
Activity Time

30 Minutes
Device
- TI-83 Plus Family
- TI-84 Plus
- TI-84 Plus Silver Edition
Applications
- Cabri™ Jr. for TI-83 Plus and TI-84 Plus
Other Materials

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Cabri Jr. Inscribed Angles

Activity Overview

This activity uses Cabri™ Jr to discover that inscribed angles subtended by the same arc in a circle are congruent.

Before the Activity

1. Draw a circle in the center of the screen. Label the center O.

Use the point tool to make four points on the circle. Do not use the radius point of the circle as one of the points. Label the points A, B, C and D as in Figure 1a.

Construct an angle BAC using the Segment tool.

Construct an angle BDC using the Segment tool. See Figure 1b.

During the Activity

Students will use Cabri™ Jr to discover that inscribed angles subtended by the same arc in a circle are congruent

After the Activity

Review student answers:

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

Re-teach concepts as necessary

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Download

Before the Activity Files

Alignment

Subject Area

Author

Level

Activity Time

Device

Applications

Cabri™ Jr. for TI-83 Plus and TI-84 Plus

Other Materials