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Alignment
- Standards Alignment
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Subject Area
- Math: Geometry: Quadrilaterals
Author

Texas Instruments
Level

9-12
Activity Time

45 Minutes
Device
- TI-84 Plus
- TI-84 Plus Silver Edition
- TI-84 Plus C Silver Edition
- TI-84 Plus CE
Software

TI Connect™ CE
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Measuring Angles in a Quadrilateral

Updated on 02/10/2015

Activity Overview

Students determine the sum of the interior angles of a quadrilateral.

Key Steps

Students will construct a quadrilateral and measure the interior angles.
Students will find the sum of the interior angles of their quadrilateral. Then, they will move vertices to change the angle measures and find the sum again. Students should find that the sum of the interior angles of a quadrilateral is always 360 degrees.