coordinates
DESCRIPTION
Coordinates. Check for Success Along then up Remember comma (and brackets). ( ). ,. 6 4. 8. y. 6. 4. Up Stairs. 2. Along Corridor. x. 0. 2. 4. 6. 8. 10. The Test of Success. What is to be learned?. Check for success Along then up Remember comma (and brackets). - PowerPoint PPT PresentationTRANSCRIPT
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