What is a QUADRILATERAL?

Quadrilateral

4 SIDE

Please teach your partner

what quadrilateral

means.

Which of these shapes would be called “quadrilaterals”?

square

parallelogram

rhombus

rectangle

Quadrilaterals

trapezoid

In this slide show you will learn that we identify

quadrilaterals by:

and the length of their sides.

their angles

Square A square has four sides that are each

the same length. It also has four right angles (perfect

corners).

1

2 3

4

Parallel

Lines?

Please teach your partner why it is a square

Rhombus A rhombus has four sides that are

each the same length. But it has two acute and two obtuse

angles.

acute

acuteobtuse

obtuse

Parallel

Lines?

Square and Rhombus

A square and a rhombus both have four sides that are the same length. So, how are they different?

Square and Rhombus

A rhombus can be thought of as a slanted square.

If we push on the left-hand side of this square, it might end up looking like…

a rhombus.

The only difference between a square and a

rhombus is…their angles!

Please teach your partner the difference between a square and a rhombus and how they are the same & different using math

vocabulary & names.

Trapezoid A trapezoid has four sides. They are

all different lengths. Two sides are parallel. The opposing two sides are not

parallel.

Those are parallel.

Those are not parallel.

Please teach your partner what a trapezoid is…

Rectangle• A rectangle has four

sides – two long sides and two short sides.

• Two sides are parallel.

• The opposing two sides are also parallel.

• It also has four right angles.

Teach your partner the Difference between a rectangle and a rhombus.

Parallelogram• A parallelogram has four

sides – two long sides and two short sides.

• Two sides are parallel.

• The opposing two sides are also parallel.

• But, it has two acute and two obtuse angles.

Rectangle and Parallelogram

A parallelogram can be thought of as a slanted rectangle.

If we push on the left-hand side of this rectangle, it might end up looking like…

a parallelogram.

Please teach your partner the difference between a

rectangle and a parallelogram.

The only difference between a rectangle and

a parallelogram is their angles.

Use the following table to make comparisons using the

quadrilaterals.

QuadrilateralsSHAPE SIDES ANGLES PARALLEL

LINES

Square

Rhombus

Trapezoid

Rectangle

Parallelogram

4 same length

4 right angles

2 sets

4 same length

2 acute 2 obtuse 2 sets

Different lengths

Different angles

1 set

2 long, 2 short

4 right angles 2 sets

2 long, 2 short

2 acute 2 obtuse 2 sets

Write in your journals:

What is the difference between a square and a rhombus?

What is the difference between a rectangle and a parallelogram?

Why is a trapezoid a quadrilateral and not a parallelogram?