Ratios in Regular Polygons

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Elementary Math: Geometry

Level

K-5

Activity Time

60 Minutes

TI Calculator

TI-15 Explorer™/TI-10

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Ruler
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Protractors

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Ratios in Regular Polygons

Activity Overview

Students use linear measurement and calculators to investigate the ratios between corresponding parts of regular polygons.

Before the Activity

See the attached PDF file for detailed instructions for this activity

Print student activity sheets pages 97 - 98 from the attached PDF file for your class

During the Activity

Distribute the pages to the class.

Follow the activity procedures:

Draw several triangles, compare them, and look for any similarities among all the triangles

Draw several different sized equilateral triangles, compare the triangles, and look for similarities

Do the same experiment with rectangles, and then squares

Note, the rectangles come in all shapes; the squares are all the same shape but different sizes

Give students the picture of several different-sized squares, and have them measure the length of the diagonal and the perimeter of each square, record their findings on the recording sheet, and look for patterns

Record the same data for other regular polygons of several different sizes and look for patterns

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: Elementary Math: Geometry

Level

K-5

Activity Time

60 Minutes

TI Calculator

TI-15 Explorer™/TI-10

Other Materials

Ruler
Pencils
Protractors

Resource Types

Lessons

Report an Issue

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Ratios in Regular Polygons

Ratios in Regular Polygons

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