1. http://www.brainpop.com/math/geom etryandmeasurement/polygons/

2. Let’s Review- What is a polygon?
Polygons are many-sided figures
With sides that are line segments
Named according to the number of sides and angles they have.
Can be “regular” – all sides and all angles are equal to each other

3. Polygons
These figures are not polygons
These figures are polygons

4. Polygon Names 3 sides Triangle 4 sides Quadrilateral 5 sides Pentagon
Hexagon
7 sides
Heptagon
8 sides
Octagon
9 sides
Nonagon
10 sides
Decagon
Dodecagon
12 sides
n sides
n-gon

5. Parallel Lines Parallel Lines Not Parallel
Two lines are parallel if they are on the same plane and never intersect.
Plane- flat surface.
Intersect – means never touch.
Parallel Lines Not Parallel

6. QUADRILATERALS

7. QUADRILATERAL
A QUADRILATERAL is a closed figure with four sides and four angles.
They are named based on their sides and angles.

8. The sum of the angles of all quadrilaterals is 360°.
Angle 1 + angle 2+ angle 3 + angle 4 = 360°
360°

9. Parallelogram
A QUADRILATERAL with opposite sides parallel and opposite sides congruent

10. Rectangle A rectangle is All angles are right QUADRILATERAL – 4 sides
PARALLELOGRAM – opposite sides are parallel
All angles are right

11. SQUARE A square is a All sides are congruent All angles are right
QUADRILATERAL – 4 sides
PARALLELOGRAM – opposite sides are parallel
All sides are congruent
All angles are right

12. RHOMBUS A rhombus is a All sides are congruent
QUADRILATERAL – 4 sides
PARALLELOGRAM – opposite sides are parallel
All sides are congruent
Opposite angles congruent

13. TRAPEZOID Parallel lines A trapezoid is a
QUADRILATERAL – 4 sides
Exactly one pair of parallel sides
Parallel lines

14. Kite A kite is a With no parallel sides
QUADRILATERAL – 4 sides
With no parallel sides
2 pairs of adjacent congruent sides
4 in.
2 in.
2 in.
4 in.

15. Quadrilateral
Parallelogram
Rhombus
Rectangle
Square
Trapezoid

16. 2 pairs of parallel lines 1 pair of parallel lines 2 pairs of adjacent
A quadrilateral simply has 4 sides – no other special requirements.
Quadrilateral
2 pairs of parallel lines
1 pair of parallel lines
2 pairs of adjacent
congruent lines
Parallelogram
Trapezoid
4 congruent
sides
4 right
angles
A parallelogram has two pairs of parallel sides.
A trapezoid has only one pair of parallel sides.
Kite
Rhombus
An kite is a quadrilateral with NO parallel sides but 2 pairs of adjacent congruent sides.
Rectangle
4 congruent
sides and 4 right angles
A rectangle has four right angles.
A rhombus is a parallelogram that has four congruent sides.
A square is a specific case of both a rhombus AND a rectangle, having four right angles and 4 congruent sides.
Square

17. Best Name:

18. Best Name:
Trapezoid

19. Best Name:

20. Square Best Name: This quadrilateral is also: a rectangle a rhombus
a parallelogram

21. Best Name:

22. Best Name:
Rhombus
This quadrilateral is also:
a parallelogram

23. Best Name:

24. Best Name:
Quadrilateral

25. Best Name:

26. Best Name:
Rectangle
This quadrilateral is also:
a parallelogram

27. Best Name:

28. Best Name:
Parallelogram

29. Best Name:

30. Best Name:
Trapezoid

31. Best Name:

32. Best Name:
Quadrilateral

33. Best Name:

34. Best Name:
Parallelogram

35. Best Name:

36. Best Name:
Trapezoid

37. Best Name:

38. Best Name:
Rectangle
This quadrilateral is also:
a parallelogram

39. Best Name:

40. Best Name:
Rhombus
This quadrilateral is also:
a parallelogram

41. Best Name:

42. Square Best Name: This quadrilateral is also: a rectangle a rhombus
a parallelogram

43. You rock!