Activity Overview
In this activity, students visualize and explore the angles that are formed when two lines intersect. By measuring angles formed by intersecting lines, they enhance their understanding of vertical angles, supplementary angles, and a linear pair. NCTM Geometry Standard covered: Analyze characteristics and properties of 2- and 3-dimensional geometric shapes and develop mathematical arguments about geometric relationships.
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
See the attached PDF file for detailed instructions for this activity
Print pages 9-10 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
Measure one pair of vertical angles, using the Angle measure tool
Move a line to change the angles
Observe the changes in the angle measures
After the Activity
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary