Coordinates

1
Coordinates
Coordinates
Plotting Coordinates
Different Grids
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Proper Names
Extending the Grid
2
Starter Questions
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3
Coordinates
Coordinates
Learning Intention
Success Criteria

1. To be able to read a coordinate grid.

1. To explain how to read coordinate grids.

2. To solve problems using grid.
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4
Coordinates
Coordinates
Up
Along 1 Up 1
(1,1)
Along 3 Up 1
(3,1)
5
Along 2 Up 4
(2,4)
4
(0,2)
3
(1,4)
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2
(2.5,2.5)
1
(4,0)
(4,2)
0
1
3
2
5
4
Along
(5,4)
5
Coordinates
Coordinates
Now try Exercise 1 Ch1 (page 2)
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6
Starter Questions
2
6
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100o
7
Coordinates
Plotting Points
Learning Intention
Success Criteria

1. Draw a coordinate grid.

1. To explain how draw a coordinate grid and
add some points to it. brackets.
2. Plot points on a grid using along and up
rules.
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8
Coordinates
Coordinates
Up
(1,2)
(3,1)
5
(2,5)
4
(5,2)
3
(1,4)
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2
(4,2)
(0,3)
1
(3,0)
0
(0,0)
1
3
2
5
4
Along
(2,3)
9
Coordinates
Different Grids
Up
Plot the points
(1,1)
5
(1,3)
4
(3,3)
(3,1)
3
Join up the points Why shape do you get
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2
Square
1
0
1
3
2
5
4
Along
10
Coordinates
Different Grids
Up
Plot the points
(0,1)
5
(2,5)
4
(4,3)
3
Join up the points Why shape do you get
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2
Triangle
1
0
1
3
2
5
4
Along
11
Coordinates
Different Grids
Up
Plot the points
(1,0)
5
(1,4)
4
(3,0)
(3,4)
3
Join up the points Why shape do you get
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2
Rectangle
1
0
1
3
2
5
4
Along
12
Coordinates
Different Grids
Now try Ex 2 3 Ch1 (page 5)
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13
Starter Questions
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5 cm
2cm
14
Coordinates
Proper Names
Learning Intention
Success Criteria

• Know the terms origin ,
• x-axis and y-axis.

1. To explain the proper mathematical names for
various parts of the coordinate grid.

• First number is always
• x-coordinate and
• second number is always the y-coordinate.

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15
Coordinates
Proper Names
X
Up
Plot the point
y - axis
(4,3)
5
4
x-coordinate is 4
y-coordinate is 3
3
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2
(2,4)
x-coordinate is 2
1
y-coordinate is 4
0
X
1
3
2
5
4
origin
Along
x - axis
16
Coordinates
Proper Names
Now try Exercise 4 Ch1 (page 6)
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17
Starter Questions
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18
Coordinates
Extending the Grid
Learning Intention
Success Criteria

1. Identify main parts of coordinate grid.

1. To show how we can extend the coordinate
grid to include negative numbers.
2. Understand the negative grid both in y-axis
direction and x-axis direction.
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19
Coordinates
Extending the Grid
We can show we have gone below the axis by using
a negative.
Plot the point
y - axis
(4,3)
3
x-coordinate is 4
2
1
y-coordinate is 3
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origin
0
1
3
2
5
4
x - axis
-1
(2,-3)
-2
x-coordinate is 2
-3
y-coordinate is -3
Write down coordinates of the other points
20
Coordinates
Extending the Grid
We can further extend the negative grid
Plot the point
y - axis
(-2,2)
3
x-coordinate is -2
2
1
y-coordinate is 2
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origin
0
-2
-3
2
4
-1
1
3
-4
x - axis
-1
(-4,-2)
-2
-3
x-coordinate is -4
y-coordinate is -2
Write down coordinates of the other points
21
Coordinates
Extending the Grid
Now try Exercise 5 Ch1 (page 7)
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