9013 SayPro Lesson 2.3 Quadrilaterals:

Quadrilaterals are polygons with four sides. Table 4.1 contains examples of different types of quadrilaterals.

Quadrilaterals	Description	Examples
Parallelogram	A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel. An additional property of a parallelogram is that both pairs of opposite sides are congruent.	Note: Similar arrow markings indicate that the sides are parallel.
Rhombus	A rhombus is a parallelogram with four congruent sides. Both pairs of opposite sides are parallel.	Note: Angled tic marks indicate parallel lines. Congruency is shown with similar sets of tic marks.
Rectangle	A rectangle is a parallelogram that has four right angles. Since rectangles are parallelograms both pairs of opposite sides are congruent. are all right angles.
Square	A square is a parallelogram with four congruent sides and four congruent angles. Therefore, a square is a rectangle and a rhombus. are all right angles.
Trapezoid	A trapezoid is a quadrilateral that has exactly one pair of parallel sides. (Note: A trapezoid is sometimes defined in a more inclusive manner – a quadrilateral with at least one pair of parallel sides (allowing for parallelograms to be trapezoids); however, for the NECAP assessment, we will use the more exclusive definition given above.)