Activity Overview
In this activity, students use the Cabri™ software to mark points, draw lines, construct parallel and perpendicular lines, angles, bisectors, and triangles. They learn how to use the tool to measure angles.
Before the Activity
Install the Cabri™: Jr. App on the students' graphing calculators using one of these two methods:
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 1 - 5 from the attached PDF file for your class
During the Activity
Distribute the pages to the class.
Follow the Activity procedures:
Mark points and label them
Draw two intersecting lines and label the point of intersection
Construct an angle by drawing two rays sharing a common vertex
Measure the angle and then drag to change its measure
Bisect the angle, and measure an angle created by the bisector
Observe that the measure of this angle is half of the original
Draw a line and construct a line parallel to that line
Draw a line and construct a perpendicular line
Construct and label a triangle
After the Activity
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary