Enlargement and Reduction What is to be learned? How to enlarge (and reduce) shapes mathematically.
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Enlargement and Reduction
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Transcript of Enlargement and Reduction What is to be learned? How to enlarge (and reduce) shapes mathematically.
Enlargement and Reduction
What is to be learned?
• How to enlarge (and reduce) shapes mathematically
Enlargement
Shape gets bigger!
Let’s be more mathematical
EnlargementDouble the size
4
3
8
Every Line Doubles
6
Original Enlargement
(Scale Factor = 2)
Enlargement
Double the size
2
Leave tricky lines till last
5Original Enlargement
Draw original first
Tactics
10
4
More Difficult
Double the size
4
3Original Enlargement
6
8
Two Tricky Lines!
Leave tricky lines till last
4
2
8
4
Reduction
Shape gets smaller!
Reduction
Half the size
4
Leave tricky lines till last
6Original Reduction
Draw original first
Tactics
3
2
6
3
(Scale Factor = ½ )
Enlargement and Reduction in Real Life
Photographs
Models
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
