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ROTATIONS INTRODUCTION ROTATION Turns a shape about a fixed point

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Presentation on theme: "ROTATIONS INTRODUCTION ROTATION Turns a shape about a fixed point"— Presentation transcript:

1 ROTATIONS INTRODUCTION ROTATION Turns a shape about a fixed point
Three things you need to know 1) Direction Clockwise Anti-clockwise 2) Angle 90° 180° 270° 360° Quarter turn Half turn Three-quarters turn Full turn 3) Centre of rotation The point where you rotate from. 1

2 Rotate the shape 90˚ (a quarter turn) clockwise about the origin

3 Rotate the shape 90˚ (a quarter turn) clockwise about the origin

4 Rotate the shape 90˚ (a quarter turn) anti-clockwise about the point A

5 Rotation Rotate the shape 180˚ (half a turn) about the origin

6 B D C A Rotate the shape Q1 90˚ clockwise about the origin
ANTI-CLOCKWISE The correct answer is B Shane thought the answer was C. Why do you think he got this answer? What did he do wrong? B D C A

7 B D C A Rotate the shape anti-clockwise Q1 Q1
90˚ clockwise about the origin CLOCKWISE ANTI-CLOCKWISE anti-clockwise A B C D The correct answer is B Shane thought the answer was C. Why do you think he got this answer?

8 B A D C Q2 Rotate the arrow 90˚ anti-clockwise about the origin
The correct answer is A Shane got it right this time but Lily thought the answer was D. Why do you think she got this answer? What did she do wrong? B A D C

9 B A D C 180˚ Q2 Rotate the tiger 90˚ anti-clockwise about the origin
The correct answer is A Shane got it right this time but Lily thought the answer was D. Why do you think she got this answer? What did she do wrong? B A D C

10 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 10 Which shape shows the red shape rotated 90o anticlockwise about the origin? C A D B

11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 10 Which shape shows the red shape rotated 90o clockwise about the origin? C D A B

12 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 10 Which shape shows the red shape rotated 180o clockwise about the origin? C A B D

13 Time to try some rotations!
Follow these steps Go to the centre of rotation, draw a cross on the paper Put the tracing paper over your paper – draw the centre, the cross and the shape Put your pencil on the centre, rotate the tracing paper until the cross is back on itself Rotate once (90°) Rotate twice (180°) Rotate 3 times (270°)

14 ROTATIONS 1) 2) 3) 4) 5) 6) Rotate the shape 270° clockwise 14

15 ROTATIONS 1) 2) 3) x x x Rotate the shapes from the points given: 15

16 ROTATIONS 4) 5) 6) x x x Rotate the shapes from the points given: 16

17 Describing ROTATIONS A B x B A Describe the transformation which takes shape A to B. Describe the transformation which takes shape A to B. A rotation 90° clockwise about the origin (0,0). A rotation 180° about the point (1,3). 17

18 A translation by vector −𝟒 𝟎
Describe fully the transformation that takes the green shape to the pink shape.

19 A reflection in the line x=0 or y-axis
Describe fully the transformation that takes the green shape to the pink shape.

20 A reflection in the line y=0 or x-axis
Describe fully the transformation that takes the green shape to the pink shape.

21 A rotation through 90° anticlockwise about the origin
Describe fully the transformation that takes the green shape to the pink shape.

22 A translation by vector 𝟎 −𝟒
Describe fully the transformation that takes the green shape to the pink shape.

23 A translation by vector 𝟐 𝟏
Describe fully the transformation that takes the green shape to the pink shape.

24 A rotation through 90° clockwise about the origin
Describe fully the transformation that takes the green shape to the pink shape.

25 Describe fully the transformations from the shaded flag to P, Q and R


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