Education Technology

Geometry: Properties of Parallelograms - 1

by Texas Instruments


Students explore the various properties of parallelograms and the necessary and sufficient conditions that guarantee that a quadrilateral is a parallelogram.

Key Steps

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    Students will use the Cabri™ Jr. App to discover several properties of parallelograms. Students will discover that opposite sides are congruent, opposite angles are congruent, and consecutive angles are supplementary.

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    Next, students will discover that diagonals of a parallelogram bisect each other.

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    As an extension, students will be asked to find the midpoint of all sides of a quadrilateral and connect these midpoints to form another quadrilateral. Students will be asked to discover what type of quadrilateral is created.