Activities

Download
- Download All Files (ZIP)
- Before the Activity Files
- Circles all Around.pdf
- During the Activity Files
- DiameterCircumference.act
Alignment
- Standards Alignment
- Textbook Alignment
Subject Area
- Math: Geometry: Circles
Author

Texas Instruments
Level

6-8
Activity Time

20 Minutes
Device
- TI-73 Explorer™
Other Materials
- DiameterCircumference.act
- Measuring tapes (customary and metric units)
- String (optional)
- Variety of objects with a circular section (soda can, garbage can, top of stool, etc.), access to at least one object that it is difficult to measure either the circumference or diameter (such as a round building column or center circle on a basketball court)
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Circles All Around

Activity Overview

This activity provides students an opportunity to explore the relationship between the diameter of a circle and its circumference

Before the Activity

See the attached PDF file for detailed instructions for this activity

During the Activity

Students will:

Apply appropriate techniques, tools, and formulas to determine measurements

Solve problems involving scale factors, using ratio and proportion

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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Before the Activity Files

During the Activity Files

Alignment

Subject Area

Author

Level

Activity Time

Device

Other Materials