1. WARM UP: What is the definition of Congruent?
What is the definition of Parallel?
What is a Right Angle?

2. Classifying Quadrilaterals

3. What is a quadrilateral?
A quadrilateral is a closed 2 dimensional figure with 4 sides that are line segments. The sum of all the angles is 360O.

4. What is a parallelogram?
Quadrilateral – 4 sides
Opposite sides congruent
Opposite sides parallel

5. What is a rectangle? Quadrilateral- 4 sides
Parallelogram- opposite sides parallel
All angles are right angles which equals 90O.

6. What is a rhombus? Quadrilateral- 4 sides
Parallelogram- opposite sides parallel
Four congruent sides.

7. What is a square? Quadrilateral – 4 sides
Parallelogram- opposite sides parallel
Rectangle- 4 right angles
Rhombus- 4 sides congruent

8. What is a trapezoid? Quadrilateral – 4 sides
Exactly one pair of parallel sides

9. What is a isosceles trapezoid?
Quadrilateral – 4 sides
Exactly one pair of parallel sides
One pair of non-parallel sides that are congruent

10. What is a right trapezoid?
Quadrilateral – 4 sides
Exactly one pair of parallel sides
Has two angles that equal 90O

11. What is a Kite? Quadrilateral – 4 sides
Has two pairs of adjacent sides of equal length
None of its angles are more then 180O

12. Quadrilateral family tree
This family tree shows how the quadrilaterals are related.
QADRILATERAL
KITE
TRAPEZOID
PARALLELOGRAM
RIGHT
TRAPEZOID
RHOMBUS
RECTANGLE
ISOSCELES
TRAPEZOID
SQUARE

13. What are all of the names for this polygon?
Quadrilateral
Parallelogram
Rectangle
Which name best describes the shape?

14. What are all of the names for this polygon?
Quadrilateral
Parallelogram
Which name best describes the shape?

15. What are all of the names for this polygon?
Quadrilateral
Parallelogram
Rhombus
Which name best describes the shape?

16. What are all of the names for this polygon?
Quadrilateral
Trapezoid
Isosceles Trapezoid
Which name best describes the shape?

17. What are all of the names for this polygon?
Quadrilateral
Parallelogram
Square
Rhombus
Rectangle
Which name best describes the shape?

18. Can you identify this shape from its properties?
WHAT AM I:
Can you identify this shape from its properties?
I am a quadrilateral.
I have two pairs of adjacent sides of equal length.
None of its interior angles are more then 180°.
The shape is a kite.

19. Can you identify this shape from its properties?
WHAT AM I:
Can you identify this shape from its properties?
It is a quadrilateral.
It has one pair of parallel sides.
One pair of opposite, non-parallel sides are the same length.
The shape is an isosceles trapezoid.