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Glossary

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Transformations and SymmetrySimilarity

Reveal All Steps

So far, we have just looked at rigidcongruentvisual transformations. Now let’s think about one that is not: a dilation changes a shape’s size by making it larger or smaller.

All dilations have a center and a scale factor. The center is the point of reference for the dilation and scale factor tells us how much the figure stretches or shrinks.

If the scale factor is between 0 and 1, the image is smallerlarger than the original. If the scale factor is larger than 1, the image is largersmaller than the original.

Scale factor: ${s}

COMING SOON – More on Dilations and Similarity

Triangles are not just useful for measuring distances. In the next course we will learn a lot more about triangles and their properties.