Education Technology

Geometry: Properties of Trapezoids and Isosceles Trapezoids

by Texas Instruments - Bell Ringer Lesson


A trapezoid is a quadrilateral where one pair of sides is parallel while the other two sides are not. In an isosceles trapezoid the non-parallel sides are congruent. In this activity we will attempt to create an isosceles trapezoid from an ordinary trapezoid, then approach the problem in a different manner and finally, examine the properties of trapezoids.

Key Steps

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    Students will construct line segments. 

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    Students will construct a trapezoid to verify a property of trapezoids.