Activity Overview
In this activity, students use the distance of the circumcenter of a triangle to each vertex of the triangle as the radius and draw a circle using the circumcenter as the center. 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
Set up the
TI-Navigator™ system
See the attached PDF file for detailed instructions for this activity
Print pages 23-24 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Send the figure from Activity 9 saved as an APP VAR via the
TI-Navigator
Draw a triangle
Draw the perpendicular bisector of each side of the triangle
Locate the circumcenter
Find the distance from the circumcenter to a vertex of the triangle
Draw the circumcircle of the triangle
After the Activity
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary