From a Distance...You Can See It!

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: PreAlgebra: Geometry

Level

9-12

Activity Time

60 Minutes

TI Calculator

TI-30 X IIS™ / TI-30Xa

Other Materials

3 X 5 index cards
Coordinate grid paper

Resource Types

Lessons

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From a Distance...You Can See It!

Activity Overview

Students find the distance between points using common fractions and decimals, with the concepts of midpoint and distance. They also learn to solve problems using the Pythagorean theorem.

Before the Activity

See the attached PDF file for detailed instructions for this activity

Print pages 97 - 100 from the attached PDF file for your class

During the Activity

Distribute the pages to the class.

Follow the activity procedures:

Draw a line segment and label three midpoints as described

Use the calculator to determine the measure of each half segment

Plot a trapezoid on a grid paper

Mark and label the midpoints of three sides

Use the midpoint formula to find the midpoint of the fourth side

Use the distance formula to determine the length of the fourth side

Draw a diagonal along a 3" x 5" card, forming two right triangles

Draw an altitude from the right triangle to the hypotenuse of one of the right triangles, forming three triangles

Measure the lengths of the sides of the three triangles and record the values in a table

Compare side lengths and check if they confirm to the Pythagorean theorem

After the Activity

Students complete the Student Activity pages and solve problems.

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: PreAlgebra: Geometry

Level

9-12

Activity Time

60 Minutes

TI Calculator

TI-30 X IIS™ / TI-30Xa

Other Materials

3 X 5 index cards
Coordinate grid paper

Resource Types

Lessons

Report an Issue

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From a Distance...You Can See It!

From a Distance...You Can See It!

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