1. The prefix Tri means 3.
Triangle
Trilogy
Tricycle
Trilingual

2. A quadrilateral is a ________- ______________ polygon.
The prefix QUAD means 4.
Quadrant
Quadruple
Quadricepts
Quadrilateral
A quadrilateral is a ________- ______________ polygon.

3. To name a quadrilateral...
Pick one letter and name them off in clockwise order
QUAD
UADQ U Q
ADQU A D
DQUA

4. Consecutive C B
Consecutive
Sides
and 𝐵𝐶 𝐴𝐵 A D
One after the other

5. Consecutive C B
Consecutive
Vertices ∠C ∠D
and A D
One after the other

6. Segment with two nonconsecutive vertices
Diagonal C B A D
Segment with two nonconsecutive vertices

7. Find x.

8. Find x.

9. A four-sided figure with both pairs of opposite sides parallel
Parallelograms
A four-sided figure with both pairs of opposite sides parallel

10. Properties of Parallelograms
Opposite sides are congruent

11. Opposite angles are congruent
Properties of Parallelograms
Opposite angles are congruent

12. Consecutive angles are supplementary.
Properties of Parallelograms
ADD UP TO 180
Consecutive angles are supplementary.

13. Diagonals bisect each other. This cuts the diagonals two equal pieces
Properties of Parallelograms
Diagonals bisect each other.
This cuts the diagonals two equal pieces

14. Opposite sides are parallel
Properties of Parallelograms
Opposite sides are parallel

15. Find all missing sides and angles for parallelogram KLMN23 K L 15 N M

16. 𝐹𝑖𝑛𝑑 𝐾𝑃 𝑖𝑓 𝐾𝑀 =32. K L P N M

17. Other Quadrilaterals

18. Types of Parallelograms
SQUARES
RECTANGLES
RHOMBI

19. Have all the properties of parallelograms and TWO special properties
Rectangles
Have all the properties of parallelograms and TWO special properties

20. RECTANGLE
FOUR RIGHT ANGLES

21. A quadrilateral is a RECTANGLE if and only if it has four right angles

22. Diagonals are Congruent
RECTANGLE
Diagonals are Congruent

23. Find x and y for rectangle PQRS below:

24. Find x and the lengths of the diagonals if PR = 7x and QS = 2x+10