Coordinate Geometry - Circles

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Geometry: Circles

Level

6-8

Activity Time

60 Minutes

Software

TI Connect™

TI Calculator

TI-84 series

Applications

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

Other Materials

TI-Presenter™

LCD Projector
Two screens

Resource Types

Lessons

Report an Issue

Coordinate Geometry - Circles

Activity Overview

In this activity, students investigate the relationship between the coordinates of a point on the circle, radius of a circle, and the values in the equation of the circle.

Before the Activity

Install the Cabri® Jr. App on the students' graphing calculators using one of these two methods:

TI-Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable

TI-Navigator™ "send to class" feature

See the attached PDF file for detailed instructions for this activity

Print pages 1 - 10 from the attached PDF file for your class

During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

Draw a circle of any radius in quadrant 1

Drag the circle so that the center of the circle is at the origin

Display the coordinates of point P, where the circle intersects the x-axis

Display the coordinates of the center and the equation of the circle

Notice that the x-value of P represents the radius of the circle

Drag point P along the x-axis and relate the equation of the circle to the coordinates of point P

Move the center of the circle away from the origin

Observe the coordinates of the center and point P

Observe how the values relate to the equation of the circle

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

Teacher Notes PDF

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Geometry: Circles

Level

6-8

Activity Time

60 Minutes

Software

TI Connect™

TI Calculator

TI-84 series

Applications

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

Other Materials

TI-Presenter™

LCD Projector
Two screens

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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Coordinate Geometry - Circles

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

Coordinate Geometry - Circles

Before the Activity Files

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

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