Activity Overview
In this activity, students' will explore the concepts of betweenness and the sum of parts visually, geometrically, and numerically for segments and angles using the Cabri® Jr. application. They will investigate how the sum of parts equals the whole.
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 cables
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 3 - 5 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
Draw and label a segment and a point on the segment
Measure the length of the segments
Change the position of the point and observe the change in the measures and note how they are related
Draw segments to form adjacent angles
Measure the angles formed
Change the position of the segment and observe the changes in the measures and note how they are related
After the Activity
Review student results
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary