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Parallelogram

Rectangle

Rhombus

Square

Trapezoid

In geometry a quadrilateral is a four-sided polygon, having four edges and four corners. The word is derived from the Latin words quadri, a variant of four, and latus, meaning "side".

Parallelogram

Rectangle

Rhombus

Square

Trapezoid

In geometry a quadrilateral is a four-sided polygon, having four edges and four corners. The word is derived from the Latin words quadri, a variant of four, and latus, meaning "side".

1.
Notes Quadrilaterals

A quadrilateral is a 4-sided polygon. The sum of the measures of the four angles of any

quadrilateral is 360°. Some types of quadrilaterals with which you should be familiar are

shown below.

Type Examples Properties

● Both pairs of opposite

sides are parallel.

● Both pairs of opposite

sides are congruent.

Parallelogram

● Both pairs of opposite

angles are congruent.

● Consecutive angles are

supplementary.

● Both pairs of opposite

sides are parallel.

● Both pairs of opposite

sides are congruent.

Rectangle

● All pairs of adjacent

sides are perpendicular.

● All angles are right

angles.

● Both pairs of opposite

sides are parallel.

● All sides are congruent.

Rhombus ● Both pairs of opposite

angles are congruent.

● Consecutive angles are

supplementary.

● Both pairs of opposite

sides are parallel.

● All sides are congruent.

Square ● All pairs of adjacent

sides are perpendicular.

● All angles are right

angles.

● Exactly one pair of

opposite sides is parallel.

Trapezoid ● Exactly two pairs of

consecutive angles are

supplementary.

A quadrilateral is a 4-sided polygon. The sum of the measures of the four angles of any

quadrilateral is 360°. Some types of quadrilaterals with which you should be familiar are

shown below.

Type Examples Properties

● Both pairs of opposite

sides are parallel.

● Both pairs of opposite

sides are congruent.

Parallelogram

● Both pairs of opposite

angles are congruent.

● Consecutive angles are

supplementary.

● Both pairs of opposite

sides are parallel.

● Both pairs of opposite

sides are congruent.

Rectangle

● All pairs of adjacent

sides are perpendicular.

● All angles are right

angles.

● Both pairs of opposite

sides are parallel.

● All sides are congruent.

Rhombus ● Both pairs of opposite

angles are congruent.

● Consecutive angles are

supplementary.

● Both pairs of opposite

sides are parallel.

● All sides are congruent.

Square ● All pairs of adjacent

sides are perpendicular.

● All angles are right

angles.

● Exactly one pair of

opposite sides is parallel.

Trapezoid ● Exactly two pairs of

consecutive angles are

supplementary.