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

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Presentation on theme: "All about Shapes Properties of Shapes Number of sides Number of angles Number of lines of symmetry Regular or irregular Right Angles Parallel lines."— Presentation transcript:

1

2 All about Shapes

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

4 Shapes Quadrilaterals Triangles Polygons Key Words Regular Shapes

5 Quadrilaterals Shapes with 4 sides!

6 What shape is this?

7 A Square

8 How many lines of symmetry does a square have?

9 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

10 What shape is this?

11 A Rectangle

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

13 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

14 What shape is this?

15 A Parallelogram

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

17 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

18 What shape is this?

19 A Rhombus

20 How many lines of symmetry does a rhombus have? 21

21 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

22 What shape is this?

23 A Trapezoid

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

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

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

27 What shape is this?

28 A diamond

29 How many lines of symmetry does a diamond have? 1

30 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

31 Quadrilaterals Shapes with 4 sides!

32 Triangles Shapes with 3 sides!

33 What type of triangle is this?

34 An Equilateral Triangle

35 How many lines of symmetry does an equilateral triangle have? 1 23

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

37 What type of triangle is this?

38 An Isosceles Triangle

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

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

41 What type of triangle is this?

42 A Scalene Triangle

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

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

45 What type of triangle is this?

46 A right triangle

47 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.

48 Triangles Shapes with 3 sides!

49 Key Words Parallel Perpendicular Diagonal Vertex Bisect Regular Shape

50 Shapes are regular when All their angles are the same size All their sides are the same length

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

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

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

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

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

56 Key Words Parallel Perpendicular Diagonal Vertex Bisect Regular Shape

57 Polygons Shapes with many sides!

58 What shape is this?

59 A Hexagon

60 How many lines of symmetry does a hexagon have?

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

62 What shape is this?

63 A Pentagon

64 How many lines of symmetry does a pentagon have?

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

66 Polygons Shapes with many sides!

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

68 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

69 How many lines of symmetry? HeptagonOctagon Look at these shapes

70 Lines of symmetry HeptagonOctagon 78

71 Lines of symmetry HeptagonOctagon 78


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