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# Rotation

Rotation. Reflection. ???. I perched on the bow and travelled further. No, I perched on the stern and went further. a CM. a CM. A. A. P. B. B. D. D. C. C. G. G. P. E. E. F. F. Q. Q. a CM. a CM.

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## Rotation

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### Presentation Transcript

1. Rotation Reflection ???

2. I perched on the bow and travelled further No, I perched on the stern and went further

3. aCM aCM

4. A A P B B D D C C G G P E E F F Q Q aCM aCM

5. On the graph all the points move in a certain direction and move the same distance. This is called Translation. After the shape is moved it maintains a constant and shape and size. Can you give some examples of translational movements in life?

6. Title: Translation Copy and complete in your book: After an image is translated, the _________ between the ______________ points are equal. The ______ of the corresponding line segments are equaland the _______ corresponding angles are equal distance corresponding length size shape After the translation the______ and _______ are constant. size

7. A A P ’ B B ’ D D C C G G P ’ ’ E E F F Q ’ ’ ’ ’ ’ Q ∠CAB and ∠C’A‘B’ are called corresponding angles Point A and point A' are called corresponding points. Line segment AB and line segment A'B' are called corresponding line segments

8. On your whiteboards: Translation changes…（　　　） A ShapeB Position C SizeD Shape, position and size B

9. On your whiteboards: A D B C F E

10. On your whiteboards: In the following 6 patterns which of patterns is a translation of image 1? • 1、如图，∠DEF是∠ABC经过平移得到的, ∠ABC=33°,求∠DEF的度数. （３）

11. On your whiteboards: The four small triangles in the figure are all equilateral triangles with a side length of 2 cm. Which triangles are translations of △ABC? △ECD △FAE Translating△ABCgetsand ______