More Enlargements and Projections (AQA GCSE Maths): Flashcards

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More enlargements and projections
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Definition of scale factor

How much bigger the new shape is compared to the original

Linear measurements change by

scale factor nn

Area changes by scale factor nn

n2n^2 times

Volume changes by scale factor nn

n3n^3 times

Area increase for scale factor 2

22=42^2 = 4 times bigger

Volume increase for scale factor 2

23=82^3 = 8 times bigger

Front elevation viewpoint

Straight from the front

Side elevation viewpoint

Directly to one side

Plan view viewpoint

Directly above

What projections are

2D representations of 3D objects from specific viewpoints

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