coordinates

Coordinates

x

y

2

4

102 4 6 8

6

8

0

6 4

Check for SuccessAlong then up

Remember comma

(and brackets)

,( )

Along Corridor

Up Stairs

The Test of Success

What is to be learned? Check for success

Along then up

Remember comma

(and brackets)

How to read coordinates of a point

x

y

2

4

102 4 6 8

6

8

0

2 5,( )A A

B

(8 , 1)B

2

4

1

3

52 41 3-5 -2-4 -1-3

-2

-4

-1

-3

x

y

0

Coordinates With NegativesCheck for Successx then y

(-3 , -2)

x is across( a cross)

y is up( wise up!)

The Test of Success

2

4

1

3

52 41 3-5 -2-4 -1-3

-2

-4

-1

-3

x

y

0

(-5 , 2)A A

B

(4 , -3)B

What is to be learned?

How to read coordinates of points with negatives

Check for success

x then y

Steps to success MeasureMultiply by scaleCheck new units

Calculating Real Distance

scale 1cm = 10m

3cm

3 X 10 = 30m

The Test of Success

What is to be learned?

How to use scale to calculate real distances

Steps to success

Measure

Multiply by scale

Check new units

scale 1cm = 100m

3cm

3 X 100 = 300 m*

*actually 324m

Steps to success Choose a scaleDivide by scale Draw lines carefully

Making a Scale Drawing

scale 1cm = 10m

80m

110 ÷ 10 = 11110m

11cm

8cm

80 ÷ 10 = 8

The Test of Success

What is to be learned?

How to show real distances in a scale drawing

Steps to success

Choose a scale

Divide by scale

Draw lines carefully

LowtoonHightoon

35miles

scale 1cm = 5miles

35 ÷ 5 = 7

LH

7cm

Enlargement/Reduction

Scale Factor 2

3

Leave tricky lines till last

4Original Enlargement

Multiply all lines by Scale Factor

Steps to Success

8

6

The Test of Success

What is to be learned?

How to enlarge (and reduce) shapes mathematically

Steps to success

Leave tricky lines till last

Multiply all lines by Scale Factor

8

4Original Reduction

2

42

1

Scale Factor = ½