Activity Overview
Students will investigate the properties of angles formed by intersecting lines. They examine the definition of adjacent angles, supplementary angles, and vertical angles and learn about two important geometric theorems dealing with vertical and supplementary angles.
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
TI-Navigator™ "send to class" feature
See the attached PDF file for detailed instructions for this activity
Print pages 9 -11 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Draw two intersecting lines and measure the angles formed
Identify all pairs of adjacent angles and vertical angles
Draw two adjacent angles that are supplementary
Measure the supplementary angles and calculate the sum
After the Activity
Review student results
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary