*Quadrilateral

A plane figure with four sides and four angles.

Today we are going to learn about five special types of quadrilaterals and their

properties.

*Parallelogram

Opposite sides are parallel and congruent. Opposite

angles are congruent.

*RectangleParallelogram with four right angles. Opposite sides are parallel and equal length.

*RhombusParallelogram with four

congruent sides. Opposite sides are parallel and opposite angles

are equal.

*SquareRectangle with four congruent sides. Equal sides, four right-

angles.

*TrapezoidQuadrilateral with exactly two parallel sides. May have two right angles. 

Parallelogram

Rectangle

Rhombus

Square

.

Trapezoid

 

Quadrilaterals

Parallelogram

Parallelogram with opposite sides that are parallel and equal length.

Rectangle

Parallelogram with four right angles. Opposite sides are parallel and

equal length.

Rhombus

Parallelogram with four congruent sides. Opposite sides are parallel

and opposite angles are equal.

Square

Rectangle with four congruent sides. Equal sides, four right-

angles.

Trapezoid

Quadrilateral with exactly two parallel sides. May have two right

angles. 

Four-sided shape where all sides

have equal length. Also

opposite sides are parallel and opposite angles

are equal.

Has one pair of opposite sides parallel. Not a parallelogram because only one pair of

sides is parallel.

A four-sided shape where every angle

is a right angle (90˚).

Opposite sides are parallel and equal.

Four-sided shape where every angle is a right

angle .Opposite sides are parallel and equal

length.