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Understanding Scale Factors for Enlarging Shapes

Learn how scale factors work in enlarging objects. Discover how SF impacts size and the two key pieces of information needed for enlargements: center of enlargement and scale factor. Construction lines are an essential part of the process.

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Understanding Scale Factors for Enlarging Shapes

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  1. A scale factor (SF) more than 1 increases the size of an object, so SF of 2 doubles the size. A scale factor less than 1 reduces the size of an object, so a SF ½ halves the size. Two pieces of information are required to ‘enlarge’ a shape. 1. Centre of enlargement 2. Scale factor X Centre of enlargement. Construction lines

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