1. Polygons with four sides
Quadrilaterals
Polygons with four sides

2. Objectives You will learn about the characteristics of parallelograms.
You will use the characteristics of parallelograms to solve problems.
You will learn about the characteristics of trapezoids.
You will use the characteristics of trapezoids to solve problems.

3. Types of Quadrilaterals
Square: Quadrilateral with four equal sides and four right angles (90 degrees)
Indicates equal sides
Box indicates 900 angle

4. Types of Quadrilaterals
Rectangle: Quadrilateral with two pairs of equal sides and four right angles (90 degrees)
Indicates equal sides
Box indicates 900 angle

5. Types of Quadrilaterals
Parallelogram: Quadrilateral with opposite sides that are parallel and of equal length and opposite angles are equal
Indicates equal sides

6. Types of Quadrilaterals
Rhombus: Parallelogram with four equal sides and opposite angles equal
Indicates equal sides

7. Types of Quadrilaterals
Trapezoid: Quadrilateral with one pair of parallel sides
Parallel sides never meet.

8. Right-Angle Trapezoid

9. Isosceles Trapezoid
A geometric figure with two sides of equal length.

10. Scalene Trapezoid
A geometric figure with sides of unequal lengths.

11. Types of Quadrilaterals
Irregular shapes: Quadrilateral with no equal sides and no equal angles

12. Name the Quadrilaterals1 3 2
irregular
rhombus
rectangle 5 6 4
parallelogram
trapezoid
square

13. Interior Angles
Interior angles: An interior angle (or internal angle) is an angle formed by two sides of a simple polygon that share an endpoint
Interior angles of a quadrilateral always equal 360 degrees
Angle sum is the sum of the measures of of all the interior angles in a closed figure.