1. GSE Geometry
UNIT QUESTION: What are the properties and characteristics of polygons?
Today’s Question:
What four things do we know about all parallelograms?

2. The prefix QUADR means 4.
Quadrant
Quadruple
Quadricepts
Quadrilateral

3. To name a quadrilateral...
list the vertices in order, like the
sweeping hands of a clock.
QUAD
UADQ U Q
ADQU A D
DQUA

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

5. Consecutive C B
Consecutive
Vertices 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. Washington, D.C. United States Capitol Washington Monument
Name the attraction that
is located on a diagonal.
Name the attractions that
are located on the vertices.
Washington Monument
Jefferson Memorial
White House
Lincoln Memorial

10. You MUST memorize (learn) the 5 properties of parallelograms.

11. Opposite angles are congruent
5-8 Parallelograms
Opposite angles are congruent

12. Consecutive angles are supplementary.
ADD UP TO 180
Consecutive angles are supplementary.

13. Opposite sides are congruent

14. Diagonals bisect each other.
This cuts the diagonals into two equal parts.

15. 23 K L 15 N M

16. 23 K L 15 N M

17. 23 K L 15 N M

18. K L P N M

19. Practice
Worksheet

20. Other Quadrilaterals

21. Types of Parallelograms
SQUARES
RECTANGLES
RHOMBI

22. Have all the properties of parallelograms and TWO special properties
Rectangle
Have all the properties of parallelograms and TWO special properties

23. RECTANGLE
FOUR RIGHT ANGLES

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

25. Diagonals are Congruent
RECTANGLE
Diagonals are Congruent

26. PQRS is a rectangle P Q S R

27. PQRS is a rectangle P Q S R