1. Enlargement and Reduction

2. What is to be learned?
How to enlarge (and reduce) shapes mathematically

3. Enlargement
Shape gets bigger!
Let’s be more mathematical

4. Enlargement Double the size Every Line Doubles (Scale Factor = 2)6 3 4 8
Original
Enlargement

5. Leave tricky lines till last
Tactics
Enlargement
Draw original first
Leave tricky lines till last
Double the size 4 2 5 10
Original
Enlargement

6. Leave tricky lines till last
More Difficult
Two Tricky Lines! 8
Double the size 4 4 8 2 4 3 6
Original
Enlargement

7. Reduction
Shape gets smaller!

8. Leave tricky lines till last
Tactics
Reduction
Draw original first
Leave tricky lines till last
Half the size
(Scale Factor = ½ ) 6 4 3 2 6 3
Original
Reduction

9. Enlargement and Reduction in Real Life
Photographs
Models

10. Enlargement/Reduction
Steps to Success
Multiply all lines by Scale Factor
Leave tricky lines till last
Scale Factor 2 6 3 4 8
Original
Enlargement

11. The Test of Success Original Reduction Steps to success
What is to be learned?
Multiply all lines by Scale Factor
How to enlarge (and reduce) shapes mathematically
Leave tricky lines till last
Scale Factor = ½ 8 4 2 1 4 2
Original
Reduction