Geometry scale factor and dilation quiz

What is a scale factor?

A ratio to two corresponding sides of identical figures. A scale factor is 3 means that the image is three times larger than the original.

Note: scaled factor greater than 1 means enlargement

scaled factor less than 1 means reduction

A ratio

A relationship of two numbers by division

Scaled copy:

Same shaped but possibly different size from the original.

Dilation

A transformation that enlarges or reduces the size of an original figure.

Dilation notation

D(k,c) D is the dilation, k is the scale factor and c is the center

Coordinate rule

When applying a dilation to a point (x,y) with scale factor “k” centered at the origin, the new coordinates become (kx,ky)