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Video Tutorial: Measuring the Exterior Angles of a Triangle
using CabriJr® on a Graphing Calculator

Principles of Mathematics 9, Section 7.1 Investigate, Page 366

CabriJr® can be used on a TI83+ or TI84+ graphing calculator to construct dynamic geometry sketches. This tutorial shows you

● how to start CabriJr® and clear the screen
● how to draw a triangle with exterior angles
● how to measure the exterior angles
● how to calculate the sum of the exterior angles

7s1 Investigate (Windows Media)
7s1 Investigate Macromedia Flash




Note: You will need the newest version of the Flash Player plug-in to view the animations.






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