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Pre-Algebra: Lesson 115

2-Dimensional Figures
Quadrilaterals

Lesson Description

Students learn that a quadrilateral is a 4-sided polygon. Students also learn to classify a quadrilateral as a trapezoid (one pair of opposite sides parallel), a parallelogram (both pairs of opposite sides parallel), a rhombus (all sides congruent), a rectangle (4 right angles), or a square (all sides congruent and 4 right angles).

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