The Euler Line

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Geometry: Points, Lines and Angles

Level

9-12

Activity Time

50 Minutes

Software

TI Connect™

TI Calculator

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

Visit TI Math.com.

Resource Types

Lessons

Report an Issue

The Euler Line

Activity Overview

Students will:

Construct a scalene triangle.

Construct the Orthocenter, the Incenter, the Centroid, and the Circumcenter and observe that three of the four points are collinear.

Try to alter the properties of their construction by moving the vertices.

Before the Activity

Provide each student with a copy of the attached .pdf document.

During the Activity

This activity will help students visualize the four main triangle center points. This exercise will challenge students as it requires them to find the coordinates of the points of intersection of the special lines built on the triangle and then show that these three points are collinear.

After the Activity

Review student answers

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

Re-teach concepts as necessary

Download Files

Download All Files (ZIP)

During the Activity Files

Teacher Notes PDF

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Geometry: Points, Lines and Angles

Level

9-12

Activity Time

50 Minutes

Software

TI Connect™

TI Calculator

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

Visit TI Math.com.

Resource Types

Lessons

Report an Issue

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The Euler Line

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

The Euler Line

During the Activity Files

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

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