An object, Quad, is shown. The image of Quad after an enlargment with Centre and scale factor is shown. Images are shown with an apostrophe.

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Drag points A, B, C or D to change the object. Notice the effects on the enlarged image.

Drag the Centre to change the centre of enlargement. Observe the effects on the enlargement.

Use the slider to change the scale factor. Observe the effects on the enlargement.

Notice that the scale factor can be positive and negative and can be less than one or greater than one.

Barry Kissane, Created with GeoGebra