Education Technology

# Activities

• ##### Subject Area

• Math: Geometry: Quadrilaterals and Polygons

9-12

1 Days

• ##### Device
• TI-84 Plus
• TI-84 Plus Silver Edition
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## Test for Parallelograms

#### Activity Overview

Test for Parallelograms

#### Before the Activity

Explore relationships (including congruence and similarity) among classes of two- and three-dimensional geometric objects, make and test conjectures about them, and solve problems involving them. This activity will help students visualize the converse of the properties of a parallelogram. Extensions are in the problem already. Students will have to test their constructions after dragging vertices.

#### During the Activity

Students will: 1. Construct a parallelogram and test the property - opposite sides are always the same distance apart. 2. Construct a quadrilateral that has no special properties ? that is, none of the opposite sides are congruent or parallel. 3. Move the vertices to satisfy given conditions that lead them to conclude that the quadrilateral becomes a parallelogram only if these conditions are satisfied.