Coordinate geometry
- 2. Copyright © 2000 by Monica Yuskaitis
*
* Grid – A pattern of horizontal and
vertical lines, usually forming
squares.
- 3. Copyright © 2000 by Monica Yuskaitis
*
* Coordinate grid – a grid used to
locate a point by its distances from
2 intersecting straight lines.
A
B
C
D
E
1 2 3 4 5
What are the
coordinates
for the house?
- 4. Copyright © 2000 by Monica Yuskaitis
*
* x axis – a horizontal number line
on a coordinate grid.
1 2 3 4 50 6
x
- 5. Copyright © 2000 by Monica Yuskaitis
*
* x is the shortest and likes to lie
down horizontally.
1 2 3 4 50 6
x
- 6. Copyright © 2000 by Monica Yuskaitis
*
* Coordinates – an ordered pair of
numbers that give the location of a
point on a grid. (3, 4)
1
2
3
4
5
0
6
1 2 3 4 50 6
(3,4)
- 7. Copyright © 2000 by Monica Yuskaitis
*
* y axis – a vertical number line on
a coordinate grid.
1
2
3
4
5
0
6
y
- 8. Copyright © 2000 by Monica Yuskaitis
*
* y is the tallest and stands upright or
vertically.
1
2
3
4
5
0
6
y
- 9. Copyright © 2000 by Monica Yuskaitis
*
* 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.
1
3
2
4
5
0
6
1 2 3 4 50 6
(3,4)
- 10. Copyright © 2000 by Monica Yuskaitis
*
* Step 1 – Always find the x value first,
moving horizontally either right
(positive) or left (negative).
1
3
2
4
5
0
6
1 2 3 4 50 6
(2, 3)
y
x
- 11. Copyright © 2000 by Monica Yuskaitis
*
* Step 2 – Starting from your new position
find the y value by moving vertically
either up (positive) or down (negative).
1
3
2
4
5
0
6
1 2 3 4 50 6
(2, 3)
(2,3)y
x
- 12. Copyright © 2000 by Monica Yuskaitis
*
* Step 1 – Find how far over horizontally
the point is by counting to the right
(positive) or the left (negative).
1
3
2
4
5
0
6
1 2 3 4 50 6
(5, )
y
x
- 13. Copyright © 2000 by Monica Yuskaitis
*
* Step 2 – Now count how far
vertically the point is by counting up
(positive) or down (negative).
1
3
2
4
5
0
6
1 2 3 4 50 6
(5,4)
y
x
