Activity Overview
In this activity, students will perform a translation, and explore the properties of translations. In the second part of this activity, they will extend the concept of translations to the coordinate plane.
Before the Activity
Install the Cabri Jr. App on the students' graphing calculators using TI-Connect™, a TI Connectivity Cable and the Unit-to-Unit Link Cable
Use the TI-Navigator™ to transfer the attached Cabri Jr. AppVar files to each calculator
See the attached PDF file for detailed instructions for this activity
Print pages 37 - 40 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Use the AppVar to go directly to the exploration section
Construct a triangle and a translation segment
Translate the triangle based on the length and direction of the translation segment
Drag the vertices and sides of the triangle and observe how the new triangle (image) changes
Drag a point on the translational segment and observe how the new triangle (image) changes
Draw a triangle to translate in the coordinate plane
Reflect the triangle across the x-axis and y-axis
Observe the relationships between the coordinates of the vertices of the pre-image and the corresponding vertices of the image
After the Activity
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary