Find where to buy the TI-84 Plus CE graphing calculator in a variety of bold, fun colors.
Download free 90-day trial versions of the most popular TI software and handheld emulators.
Celebrate pi day with some fun, meaningful activities that show students how the mathematical constant shows up in real life!
Explore teaching strategies to help students succeed on the ACT® math test using TI technology.
Students investigate an exterior angle and its two remote interior angles using a Graphs & Geometry page.
Students are given a triangle with the interior angle measures. First they will construct and find the measure of an exterior angle of a triangle. When they drag a vertex of the triangle, students will record the measurements of the exterior angle and the two remote interior angles. They will discover the corollary to the Triangle Exterior Angle Theorem.
Then students continue the exploration by using the Text and Calculate tools to find the sum of the two remote interior angles. Comparing the sum to the measure of the exterior angle, students will discover the Triangle Exterior Angle Theorem.
© Copyright 1995-2019 Texas Instruments Incorporated. All rights reserved.