1. Quadrilaterals

2. Definition
A quadrilateral is a closed geometric figure with four sides, four vertices, and four angles.
The segments of a quadrilateral intersect only at their endpoints.
Quadrilaterals
Not Quadrilaterals
Non consecutive sides should not intersect
More than 4 sides
Must only contain Segments
3 sides

3. Naming Quadrilaterals
Quadrilaterals are named by listing their vertices in order. There are many names for the quadrilateral below. Some examples are quadrilateral ABCD, quadrilateral BCDA, or quadrilateral DCBA.

4. Sides
Any two sides, vertices, or angles of a quadrilateral are either consecutive or nonconsecutive.
In a quadrilateral, nonconsecutive sides, vertices, or angles are also called opposite sides, vertices, or angles.

5. Diagonals
Segments that join nonconsecutive vertices of a quadrilateral are called diagonals.

6. Properties
The sum of all the angles equals 360º degrees.
110º
70º
360º
90º
360º
90º
360º
90º
360º
65º
115º
360º

7. Special Quadrilaterals
A quadrilateral is a four-sided polygon, but some of them have characteristics that make them special.
We will be covering 6 special quadrilaterals:
Parallelogram
Rectangle
Square
Rhombus
Kite
Isosceles Trapezoid

8. Six Special Quadrilaterals
Parallelogram
Rectangle
Isosceles
Trapezoid
Rhombus
Square
Kite

9. Special Quadrilateral Properties
Each special quadrilateral has its on properties. However there are similarities between them.
Your task is going to be to discover their properties by constructing and exploring each one.

10. Examples of Quadrilaterals in Everyday Life

11. Parallelograms

12. Rectangles

13. Squares

14. Rhombi

15. Kites

16. Isosceles Trapezoids

17. Conclusion We will be covering 6 types of quadrilaterals
Parallelograms
Rectangles
Squares
Rhombi
Kites
Isosceles Trapezoids

18. As we explore the various quadrilaterals, begin thinking about all the places that you can find them, i.e. school, car, work, home, etc.