1. Rotation
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2. What is the meaning of Rotation?
Rotate the rectangle:
90°
Clockwise
About C O c
Centre of Rotation I
Rotation is a Transformation
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3. What is the meaning of Rotation?
Rotate the triangle:
90°
Anti-clockwise
About C O I c
Rotation produces congruent shapes
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4. Formal
Rotation
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5. How do we rotate a shape in general?
Rotate this shape:
60°
Anti-clockwise
About C I O
60° c
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6. How do we rotate a shape in general?
Rotate this shape:
60°
Anti-clockwise
About C I O
60° c
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7. Rotate this shape:
90°
Anti-clockwise
About P P
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8. Rotate this shape:
90°
Anti-clockwise
About P P
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9. © T Madas

10. P Rotate this shape: 60° Clockwise About P 90 10 20 30 40 180 170 160
160 30
150 40
140 50
130 60
120 70
110 80
100 90 P
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11. P Rotate this shape: 60° Clockwise About P 90 10 180 20 170 160 30 150
160 30
150 40
140 50
130 60
120 70
110 80
100 90 P
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12. P Rotate this shape: 60° Clockwise About P 90 10 180 170 20 160 30 150
160 30
150 40
140 50
130 60
120 70
110 80
100 90 P
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13. Rotate this shape:
60°
Clockwise
About P P
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14. Rotate this shape:
60°
Clockwise
About P P
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15. Finding the Centre of Rotation
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16. Why does it work? The shapes below have been produced by rotation.
Find the centre of rotation
Why does it work?
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17. The shapes below have been produced by rotation.
Find the centre of rotation
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18. The shapes below have been produced by rotation.
Find the centre of rotation
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19. The shapes below have been produced by rotation.
Find the centre of rotation
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20. © T Madas