Day 7

Quadrilaterals

Quadrilaterals

Do you know what a quadrilateral is?

These are quadrilaterals These are not quadrilaterals

Students identify a quadrilateral

How do you know that a shape is a quadrilateral?

What are the properties of quadrilaterals?

In your group, identify as many quadrilaterals as you can, there should be 12 different ones in all.

Analyzing quadrilaterals

In what ways are all quadrilaterals alike?All have 4 sides and anglesDifferent?Not all sides or angles are the same

Think of ways you have seen quadrilaterals used in the school building’s design?

What about in the classroom?

Time to sort!Need: 2D shapes, white boards, and black markers

Take the 12 quadrilaterals and sort them into groups on your white board.

Come up with a rule for why you put the shapes together. What characteristic do they each share.

Label the groups with the rule you made.

Share with class.

Analyzing Quadrilaterals

Ways to sort quadrilaterals:Rectangles and Not rectanglesShapes with and without right anglesLarge, medium, and small4 right angles, 2 right angles, no right

anglesParallel sides and no parallel sides

What did you learn by sorting or from classmates?

What does parallel mean?

Sort the groups according to the number of parallel sides.

How many groups do you have?How many are in each group?

Parallelogram…

What is a parallelogram?A quadrilateral with two pairs of parallel

sides.

Parallelograms

Rectangles Rhombuses Other parallelograms

Rectangles are quadrilaterals with four right angles

Rhombuses are quadrilaterals with four equal sides

Squares are parallelograms with four right angles and four equal sides

TrapezoidsWhat rule could you come up with for each of the following groups?

? ?

Trapezoidsa quadrilateral with exactly one pair of parallel sides

Isoceles trapezoids Trapezoids with right angles

Other trapezoids

Now examine your shapes with no pairs of parallel sides and describe them

Why is this shape a quadrilateral?Why doesn’t it fit into any of the other groups of quadrilaterals?

No parallel sides

Using polystraws

Create at least one quadrilateral per person that is not like one of the magnets in the set.

You need to be able to describe your shape and explain to which group of quadrilaterals it belongs to.

Journal page 10

Analyzing and Describing Quadrilaterals.With your group come up with a

chart/table/graphic organizer to show and describe the different types of quadrilaterals.

Share with class

How did you describe similarities and differences of squares, rectangles, and rhombuses?

For Homework

Create a using at least 7, 2D shapes with each shape labeled, and 3 different types of angles labeled with the shapes (acute, right, obtuse, or straight)