Quadrilaterals

A quadrilateral is a polygon with

4

sides.

Study some examples

Here are some examples of quadrilaterals:

Try it yourself

Which of the following shapes are quadrilaterals?

Special types of quadrilaterals

Some quadrilaterals go by special names like rectangle, rhombus, and square. Let's learn about them!

Rectangles

What makes a shape a rectangle?

$4$ ‍ right angles
$4$ ‍ sides (because it's a quadrilateral)

Study some examples

Here are some examples of rectangles:

Try it yourself

Which of the following shapes are rectangles?

Challenge problem

Let's consider one more shape:

Is the shape a quadrilateral?

Does the shape have $4$ ‍ right angles?

So, is the shape a rectangle?

Rhombuses

What make a shape a rhombus?

All sides the same length
$4$ ‍ sides (because it is a quadrilateral)

Study some examples

Here are some examples of rhombuses:

Try it yourself

Which of the following shapes are rhombuses?

Squares

What makes a shape a square?

Sides of equal length
$4$ ‍ right angles
$4$ ‍ sides (because it's a quadrilateral)

Study some examples

Here are some examples of squares:

Try it yourself

Which of the following shapes are squares?

Challenge question 1

Drag the points to create a shape that is both a rectangle and a rhombus.

Challenge question 2

Which of the following describe this shape?

A quadrilateral is a

4-sided polygon

. Is this shape a

4-sided polygon

? Yes!

A rectangle is a quadrilateral with

4 right angles

. Does this shape have

4 right angles

? Yes!

A rhombus is a quadrilateral with

all sides of equal length

. Does this shape have

all sides of equal length

? Yes!

A square is a

4-sided polygon

with

4 right angles

and

all sides of equal length

. Is this shape a square? Yes!

So, the shape is a quadrilateral, rectangle, rhombus, and square.

Course: US Math sandbox > Unit 6

Linsicle 9

Quadrilaterals

Study some examples

Try it yourself

Special types of quadrilaterals

Rectangles

Study some examples

Try it yourself

Challenge problem

Rhombuses

Study some examples

Try it yourself

Squares

Study some examples

Try it yourself

Challenge question 1

Challenge question 2

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