1. Multiply using the grid method.

2. Read and plot coordinates in all quadrants
Learning Objective
Read and plot coordinates in all quadrants

3. Definition
Grid – A pattern of horizontal and vertical lines, usually forming squares.

4. Definition
Coordinate grid – a grid used to locate a point by its distances from 2 intersecting straight lines. 6 5 4 3 2 1 1 2 3 4 5 6

5. x x axis – a horizontal number line on a coordinate grid. 1 2 3 4 5 6
Definition
x axis – a horizontal number line on a coordinate grid. x 1 2 3 4 5 6

6. Hint
x ‘is a cross’ (across ) x 1 2 3 4 5 6

7. y y axis – a vertical number line on a coordinate grid. 6 5 4 3 2 1
Definition
y axis – a vertical number line on a coordinate grid. 6 y 5 4 3 2 1

8. Definition
Coordinates – an ordered pair of numbers that give the location of a point on a grid. (3, 4) 6 5
(3,4) 4 3 2 1 1 2 3 4 5 6

9. Hint
The first number is always the x or first letter in the alphabet. The second number is always the y the second letter in the alphabet. 6 5
(3,4) 4 3 2 1 1 2 3 4 5 6

10. How to Plot Ordered Pairs
Step 1 – Always find the x value first, moving horizontally 6 5
(2, 3) 4 y 3 2 1 x 1 2 3 4 5 6

11. How to Plot Ordered Pairs
Step 2 – Starting from your new position find the y value by moving vertically 6
(2, 3) 5 4 y
(2,3) 3 2 1 x 1 2 3 4 5 6

12. How to Find Ordered Pairs
Step 1 – Find how far over horizontally the point is by counting to the right 6 5
(5, 4) 4 y 3 2 1 x 1 2 3 4 5 6

13. How to Find Ordered Pairs
Step 2 – Now count how far vertically the point is by counting up 6 5
(5,4) 4 y 3 2 1 x 1 2 3 4 5 6

14. What is the ordered pair?
(3,5) 6 5 4 y 3 2 1 x 1 2 3 4 5 6

15. What is the ordered pair?
(2,6) 6 5 4 y 3 2 1 x 1 2 3 4 5 6

16. What is the ordered pair?
(4,0) 6 5 4 y 3 2 1 x 1 2 3 4 5 6

17. What is the ordered pair?
(0,5) 6 5 4 y 3 2 1 x 1 2 3 4 5 6

18. What is the ordered pair?
(1,1) 6 5 4 y 3 2 1 x 1 2 3 4 5 6

19. Read and plot coordinates in all quadrants
Learning Objective
Read and plot coordinates in all quadrants

20. y x Four Quadrants Grid 3 2 1 -1 -2 -3 -3 -2 -1 1 2 3
When the number lines are extended into the negative number lines you add 3 more quadrants to the coordinate grid. y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

21. y x x = -2 Four Quadrants Grid
If the x is negative you move to the left of the 0.
x = -2 y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

22. y x y = -3 Four Quadrants Grid
If the y is negative you move down below the zero.
y = -3 y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

23. How to Plot in 4 Quadrants
Step 1 - Plot the x number first moving to the left when the number is negative. y
(-3, -2) 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

24. How to Plot in 4 Quadrants
Step 2 - Plot the y number moving from your new position down 2 when the number is negative. y 3 2
(-3, -2) 1 x -1 -2 -3 -3 -2 -1 1 2 3

25. How to Plot in 4 Quadrants
When x is positive and y is negative, plot the ordered pair in this manner. y 3 2
(2, -2) 1 x -1 -2 -3 -3 -2 -1 1 2 3

26. How to Plot in 4 Quadrants
When x is negative and y is positive, plot the ordered pair in this manner. y 3 2
(-2, 2) 1 x -1 -2 -3 -3 -2 -1 1 2 3

27. Plot This Ordered Pair
(-3, -3) y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

28. Plot This Ordered Pair
(-1, 2) y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

29. Plot This Ordered Pair
(1, -1) y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

30. Plot This Ordered Pair
(2, -2) y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

31. Plot This Ordered Pair
(-3, -2) y 3 2 1 x -1 -2 -3 -3 -2 -1 1 2 3

32. Coordinates Keywords & Rules
Y Axis and positioning vertical 1 2 3 4 5 6 7 8 9 10 -9 -8 -7 -6 -5 -4 -3 -2 -1
-10 x y
Use brackets (?,?) and remember
X first
Y next
(4,8)
SECOND QUADRANT
FIRST QUADRANT
X Axis and positioning horizontal
ORIGIN
THIRD QUADRANT
FOURTH QUADRANT
Mr D. Pay

34. YOUR TASK!
Whole class investigation: Pairs plot the following coordinates on grids:
( -3, -7), (3,5), (0, -1), (1, 1), (-2, -5), (5,9), (-1, -3), (2,3).
Join al l the points, what do you notice?
Choose three of the points and add 3 to each of the x coordinates.
Chose these three new points to each other using a different coloured pencil. Try subtracting three and drawing the new points from x coordinates. What happens if you subtract three from the y and x coordinates?

35. Coordinates in 4 Quadrants.1 2 3 4 5 6 7 8 9 10 -9 -8 -7 -6 -5 -4 -3 -2 -1
-10 x y
Coordinates in 4 Quadrants. a b c d e
What are the vertex coordinates of each shape?
Mr D. Pay
8,10
-5,9
-8,9
2,7
-2,6
10,7
-10,4
-5,6
1,4
-7,4
6,4
8,4
-6,2
-1,2
1,0
10,-1
-10,-1
-6,-1
7,-1
-3,-5
4,-3
-6,-5
7,-6
-10,-5
0,-6
10,-6
-6,-8
2,-9
6,-9
-4,-10
-1,-10

36. Learning Objective
Recognise parallel and perpendicular faces and edges on 3.D shapes
Rehearse the terms polyhedron, tetrahedron and begin to use dodecahedron.

37. What is the difference between a 2D shape and 3D shape?
Which 3D shapes can you name?

38. Can you think of any objects which are the shape of a cube?

40. Can you think of any objects which are the shape of a cuboid?

42. SPHERE
Can you think of any objects which are shape of a sphere?

44. CONE
Can you think of any objects which are the shape of a cone?

46. Can you think of any objects which are the shape of a cylinder?

48. SQUARE BASED PYRAMID

49. TRIANGULAR PRISM

50. What is a Polyhedron?
Non-Polyhedrons
Polyhedrons

51. Do you notice a difference?
Non-Polyhedrons
Polyhedrons

52. Polyhedrons
A solid that is bounded by polygons with straight meeting faces.
There are two main types of solids:
Prisms and Pyramids

53. Face
The polygons that make up the sides of a polyhedron

54. Edge
A line segment formed by the intersection of 2 faces

55. Vertex
A point where 3 or more edges meet

56. Name the Polyhedron and find the number of Faces, Vertices, and Edges

57. a. b. c.
F = 5
V = 5
E = 8
F = 5
V = 6
E = 9
F = 8
V = 12
E = 18

58. Does anybody see a pattern?c.
F = 5
V = 5
E = 8
F = 5
V = 6
E = 9
F = 8
V = 12
E = 18
Does anybody see a pattern?

59. Euler’s Theorem
F + V = E + 2

60. Euler’s Theorem
F + V = E + 2
Example:

61. Euler’s Theorem
F + V = E + 2
Example:
F = 6, V = 8, E = 12

62. Euler’s Theorem F + V = E + 2 Example: F = 6, V = 8, E = 12
6 + 8 = 12 +2

63. Euler’s Theorem F + V = E + 2 Example: F = 6, V = 8, E = 12
6 + 8 = 12 +2
14 = 14

64. Example: Use Euler’s Theorem to find the value of n
Faces: 5
Vertices: n
Edges: 8

65. Visualise 3. D shapes from 2
Visualise 3.D shapes from 2.D drawings and identify different nets for a closed cube.

66. Net 1

67. Net 2

68. Net 3

69. Net 4

70. Net 5

71. Net 6

72. Net 7

73. Net 8

74. YOUR TASK! Draw the net of an open cube using five squares.
What other arrangements of five squares will also make a net which we can fold to make an open cube?
Explore different arrangements.
Cut them out to check they do indeed fold to create an open cube.

75. Nets of cubes
Solutions – There are 11 in total