Grade 4 - Progress in Mathematics

Quadrilaterals

10-6

Some quadrilaterals have special names.

A parallelogram has opposite sides

that are parallel andthat are

the same length.

Quadrilateral ABCDis a parallelogram.

A rectangle also has opposite sides

that are parallel andthat are

the same length. All the angles

of a rectangle are right angles.

Quadrilateral EFGHis a rectangle.

A square has opposite sides that

are parallel. All its sides are the

same length. All the angles

of a square are right angles.

Quadrilateral JKLM is a square.

A rhombus has opposite sides that

are parallel. All four sides are the

same length.

Quadrilateral QRSTis a rhombus.

A trapezoid has exactly one pair

of parallel sides.

Quadrilateral WXYZis a trapezoid.

Identical marks indicate

congruent sides of the figure.

A

D

B

C

E

H

F

G

K

L

J

M

T

R

Q S

Z

X Y

W

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