1. All about Shapes

2. Properties of Shapes Number of sides Number of angles
Number of lines of symmetry
Regular or irregular
Right Angles
Parallel lines

3. Shapes
Triangles
Quadrilaterals
Polygons
Regular Shapes
Key Words

4. Quadrilaterals
Shapes with 4 sides!

5. What shape is this?

6. A Square

7. How many lines of symmetry does a square have?2 1 3 4

8. Properties of a Square Has 4 equal sides Has 4 equal angles
Each angle is a right angle
Has 4 lines of symmetry
Is a regular shape

9. What shape is this?

10. A Rectangle

11. How many lines of symmetry does a rectangle have?1 2

12. Properties of a Rectangle
Has 2 pairs of equal sides
Has 4 equal angles
Each angle is a right angle
Has 2 lines of symmetry
Is an irregular shape

13. What shape is this?

14. A Parallelogram

15. How many lines of symmetry does a parallelogram have?
None!

16. Properties of a Parallelogram
Has 2 pairs of equal sides
Has 2 pairs of equal angles
Opposite sides are parallel
Has NO lines of symmetry
Is an irregular shape

17. What shape is this?

18. A Rhombus

19. How many lines of symmetry does a rhombus have?1 2

20. Properties of a Rhombus
Has 4 equal sides
Has 2 pairs of equal angles
Opposite sides are parallel
Has 2 lines of symmetry
Is an irregular shape

21. What shape is this?

22. A Trapezoid

23. How many lines of symmetry does a trapezoid have?
None!

24. How many lines of symmetry does this trapezoid have ?1
Because these angles are equal.

25. Properties of a Trapezoid
Has unequal sides
One pair of opposite sides are parallel
Usually has NO lines of symmetry
Is an irregular shape

26. What shape is this?

27. A diamond

28. How many lines of symmetry does a diamond have?1

29. Properties of a diamond
Has 2 pairs of equal sides
Has 1 pair of equal angles
Equal sides are adjacent
Has 1 line of symmetry
Is an irregular shape

30. Quadrilaterals
Shapes with 4 sides!

31. Triangles
Shapes with 3 sides!

32. What type of triangle is this?

33. An Equilateral Triangle

34. How many lines of symmetry does an equilateral triangle have?1 2 3

35. Properties of an Equilateral Triangle
Has 3 equal sides
Has 3 equal angles
Each angle is a 60o angle
Has 3 lines of symmetry
Is a regular shape

36. What type of triangle is this?

37. An Isosceles Triangle

38. How many lines of symmetry does an Isosceles Triangle have?1

39. Properties of an Isosceles Triangle
Has 2 equal sides
Has 2 equal angles
Has 1 line of symmetry
Is an irregular shape

40. What type of triangle is this?

41. A Scalene Triangle

42. How many lines of symmetry does a scalene triangle have?
None!

43. Properties of an Scalene Triangle
Has NO equal sides
Has NO equal angles
Has NO lines of symmetry
Is an irregular shape

44. What type of triangle is this?

45. A right triangle

46. Properties of a right triangle
Has 1 right angle
May be an isosceles triangle
May have 1 line of symmetry
Is an irregular shape
It will be isosceles and have 1 line of symmetry when these 2 sides are equal.

47. Triangles
Shapes with 3 sides!

48. Key Words
Regular Shape
Parallel
Perpendicular
Vertex
Diagonal
Bisect

49. Regular Shape Shapes are regular when
All their sides are the same length
All their angles are the same size

50. when they are always the same distance apart.
Parallel
Lines are parallel
when they are always the same distance apart.

51. when they meet at right angles.
Perpendicular
Lines are perpendicular
when they meet at right angles.

52. Vertex
A Vertex is a corner of a shape where two lines meet.

53. Diagonal
A Diagonal is a straight line that joins one corner (vertex) of a shape to a non adjacent corner (vertex)

54. Bisect
A line that cuts a shape exactly in half, Bisects the shape

55. Key Words
Regular Shape
Parallel
Perpendicular
Vertex
Diagonal
Bisect

56. Polygons
Shapes with many sides!

57. What shape is this?

58. A Hexagon

59. How many lines of symmetry does a hexagon have?4 1 2 5 6 3

60. Properties of a Regular Hexagon
Has 6 equal sides
Has 6 equal angles
Has 6 lines of symmetry

61. What shape is this?

62. A Pentagon

63. How many lines of symmetry does a pentagon have?1 3 4 5 2

64. Properties of a Regular Pentagon
Has 5 equal sides
Has 5 equal angles
Has 5 lines of symmetry

65. Polygons
Shapes with many sides!

66. Lines of Symmetry - Look at these shapes
Can you suggest a rule?

67. Regular shapes All the sides are the same length
All the angles are equal
Have the same number of lines of
symmetry as the number of sides

68. How many lines of symmetry?
Look at these shapes
Heptagon
Octagon
How many lines of symmetry?

69. Lines of symmetry
Heptagon
Octagon 7 8

70. Lines of symmetry
Heptagon
Octagon 7 8