Symmetry and Enlargement

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  • Created by: Elca
  • Created on: 13-04-15 13:59
Reflection and Reflectional Symmetry
1) Reflect each point one at a time 2) Use a line that is perpendicular to the mirror line 3) Make sure the reflection is the same distance from the mirror line as the original shape 4) A shape has reflectional symmetry if you can draw a mirror line
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Translation
1) When a shape has shifted left/right (x) and/or up/down (y) 2) The shift is given as a vector
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Rotational Symmetry
1) A shape has rotational symmetry if it looks exactly like the original shape when it is rotated 2) The 'order' of rotational symmetry is the number of ways the shape looks the same 3) To rotate a shape you need to know: the centre,direction,degrees
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Enlargement
1) To draw an enlargement you need to know; How much bigger/smaller to make the shape (Scale factor) & where you will enlarge the shape from (Centre of enlargement)
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Key words
perpendicular, reflection, rotation, centre of rotation, enlargement, scale factor, centre of enlargement, similar, ray
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Other cards in this set

Card 2

Front

1) When a shape has shifted left/right (x) and/or up/down (y) 2) The shift is given as a vector

Back

Translation

Card 3

Front

1) A shape has rotational symmetry if it looks exactly like the original shape when it is rotated 2) The 'order' of rotational symmetry is the number of ways the shape looks the same 3) To rotate a shape you need to know: the centre,direction,degrees

Back

Preview of the back of card 3

Card 4

Front

1) To draw an enlargement you need to know; How much bigger/smaller to make the shape (Scale factor) & where you will enlarge the shape from (Centre of enlargement)

Back

Preview of the back of card 4

Card 5

Front

perpendicular, reflection, rotation, centre of rotation, enlargement, scale factor, centre of enlargement, similar, ray

Back

Preview of the back of card 5

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