1. Quadrilaterals

2. Definition A Polygon with 4 sides and 4 angles.

3. The sum of all interior angles in a quadrilateral is 360 o.

4. The sum of all interior angles in a quadrilateral is 360 o. 70 o X o 110 o 70 o

5. Finding the Fourth Angle of a Quadrilateral What is the value of X? 70 o X o 110 o 70 o

6. The sum of all interior angles in a quadrilateral is 360 o. What is the value of X? X=360–(70+70+110) X=110 70 o X o 110 o 70 o

7. Finding the Fourth Angle of a Quadrilateral What is the value of X? X=360–(70+70+110) X=110 70 o 110 o 110 o 70 o

8. Types of Quadrilaterals

9. Quadrilaterals General Quadrilateral 4 sides, 4 angles Trapezoid Only 1 pair of parallel sides

10. Quadrilaterals General Quadrilateral 4 sides, 4 angles Trapezoid Only 1 pair of parallel sides Parallelogram Opposite sides are parallel and congruent

11. Quadrilaterals General Quadrilateral 4 sides, 4 angles Trapezoid Only 1 pair of parallel sides Parallelogram Opposite sides are parallel and congruent Rectangle A parallelogram with 4 right angles

12. Quadrilaterals General Quadrilateral 4 sides, 4 angles Trapezoid Only 1 pair of parallel sides Parallelogram Opposite sides are parallel and congruent Rectangle A parallelogram with 4 right angles Square A rectangle with 4 congruent sides

13. Quadrilaterals General Quadrilateral 4 sides, 4 angles Trapezoid Only 1 pair of parallel sides Parallelogram Opposite sides are parallel and congruent Rectangle A parallelogram with 4 right angles Rhombus A parallelogram with 4 congruent sides Square A rectangle with 4 congruent sides

14. Quadrilaterals General Quadrilateral 4 sides, 4 angles Trapezoid Only 1 pair of parallel sides Parallelogram Opposite sides are parallel and congruent Rectangle A parallelogram with 4 right angles Rhombus A parallelogram with 4 congruent sides Square A rectangle with 4 congruent sides