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Enlargements and reductions

Enlargements and reductions. Interpreting scale factor. Enlargements . We know that enlargements are an increase in the dimensions of an object.

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Enlargements and reductions

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  1. Enlargements and reductions Interpreting scale factor

  2. Enlargements • We know that enlargements are an increase in the dimensions of an object. • So…if I am enlarging something by a constant factor…is my scale factor less than 1 or greater than 1? (remember – you are multiplying by this factor) That’s right – it HAS to be greater than 1!

  3. SAY WHAT??? • If the original size of something is 1cm long, and I want it larger…. I HAVE to multiply by more than 1 to make it bigger!!! • Think about it: if you want to increase the size of something, you HAVE to multiply by more than 1!

  4. reductions • We know that reductions are a decrease in the dimensions of an object. • So…if I am reducingsomething by a constant factor…is my scale factor less than 1 or greater than 1? (remember – you are multiplying by this factor) That’s right – it HAS to be less than 1!

  5. SAY WHAT??? • Think about it: if you want to decrease the size of something, you HAVE to multiply by less than 1! If the original size of something is 4cm and I want it smaller ... I HAVE to multiply by less than 1 to make it smaller!!!

  6. GRID PAPER! a.k.a. graph paper • Use grid paper to help practice enlarging and reducing! • It helps to create accuracy.

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