coordinates y3 y4
TRANSCRIPT
Our Objectives
• Describe and find the position of a square on a grid of squares.
• Recognise simple examples of horizontal and vertical lines.
• Recognise positions and directions, e.g. describe and find the position of a point on a grid of squares where the lines are numbered.
8
7
6
5
4
3
2
1
A B C D E F G H
8
7
6
5
4
3
2
1
A B C D E F G H
D6
G3
8
7
6
5
4
3
2
1
A B C D E F G H
C8 G
7
B3
H4
E1
081
1
7
2 3
6
5
3
4
2
0 7654
8
X
What is the position of this cross?
(3,2)
coordinates are always written in brackets, with a comma between each number
the number on the horizontal axis is always written first, then the number on the vertical axis
(0,0) is called the origin
00
321
45
1
876
4 5 6 7 82 3
Who can point to……
(7,3)X
(3,7)(2,1)(1,2)(4,3)
X
XX
XX
(3,4)
Group1
Draw an 8 x 8 grid on squared paper.
Plot the following coordinates on the board: (0,5), (2,3),
(4,1), (5,0).
Join the points with a ruler.
What word do we use to describe the line you’ve
drawn?
Groups 2 and 3
Use the 8 x 8 grid.
Plot the following coordinates on the board: (0,5), (2,3), (4,1), (5,0).
Join the points with a ruler.
What word do we use to describe the line you’ve drawn?
00
321
45
1
876
4 5 6 7 82 3
(0,5)
(2,3)
(4,1)
(5,0) X
X
XX
This is a diagonal line.What other points lie on this diagonal
line?
X
X
(3,2)
(1,4)
Group1
Draw an 8 x 8 grid on squared paper.
Plot 3 corners of a square.
Give your grid to a friend.
Can they tell you the coordinate for the last corner
of the square?
Do more squares.
Groups 2 and 3
Use the 8 x 8 grid.
Plot 3 corners of a square.
Give your grid to a friend.
Can they tell you the coordinate for the last corner
of the square?
Do more squares.
00
321
45
1
876
4 5 6 7 82 3
XX
X
What are these coordinates?
(5,7)
(2,4)(7,3)
What shape would be
drawn if these coordinates were joined together?
A triangle!
WINK