Quadrilaterals

10-9

BC

AD

MN

OP

MO


NP

ST

UV

SU

TV

EF

GH

EG

FH

JK

LR

JL

KR

Quadrilaterals are four-sided polygons. They can be classified

according to the special properties of their sides or angles.

A trapezoid is a quadrilateral with

exactly one pair of parallel sides.

A parallelogram is a quadrilateral with

two pairs of parallel congruent sides.

Opposite sides as well as opposite

angles are congruent.

A rectangle is a parallelogram

with four right angles.

A square is a parallelogram with four

right angles and four congruent sides.

A rhombus is a parallelogram with

four congruent sides.

The diagram below shows how the different types of quadrilaterals are related.

rectangle

parallelogram

quadrilateral

square

rhombus

trapezoid

B C

A D

M N

O P

S T

U V

E

J

L

K

R

G

F

H

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