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Enlargements make shapes bigger or smaller than, but still proportional to, their original shapes.

Shapes can be enlarged by a particular scale factor. This ensures that the enlarged shape is bigger (or smaller) but proportional to the original shape.

A scale factor is the proportion by which the size of the shape is increased. If the shape was was enlarged by a scale factor of 3, it would be 3 times the size of the original shape.

The centre of enlargement controls the position of an enlarged shape relative to the original shape.

We can put these concepts together to enlarge a shape by a given scale factor from a particular centre of enlargement.