Enlargements (Edexcel GCSE Maths): Flashcards
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12 cards from this deck
What is an enlargement?
What is an enlargement?
A transformation that changes the size of a shape
Two pieces of info to describe an enlargement
Two pieces of info to describe an enlargement
Scale factor and centre of enlargement
What does the scale factor tell you?
What does the scale factor tell you?
How many times larger or smaller the new shape will be
Formula for scale factor
Formula for scale factor
Effect of scale factor
Effect of scale factor
Image will be larger than the original object
Effect of scale factor between 0 and 1
Effect of scale factor between 0 and 1
Image will be smaller than the original object
What is the centre of enlargement?
What is the centre of enlargement?
A fixed point from which the enlargement takes place
Property of lines through corresponding points in enlargement
Property of lines through corresponding points in enlargement
They all meet at the centre of enlargement
What stays unchanged during an enlargement?
What stays unchanged during an enlargement?
Angles remain unchanged
What changes during an enlargement?
What changes during an enlargement?
Side lengths (multiplied by the scale factor)
Effect of fractional scale factors like
Effect of fractional scale factors like
Image will be smaller than the original
How to find new vertex positions when enlarging
How to find new vertex positions when enlarging
Multiply horizontal & vertical distances by scale factor