| A | B |
|---|
| similar figures | figures that are the same shape but are different sizes |
| ratio | comparison of numbers |
| proportion | two or more ratios that are equal |
| dilation | size-change transformation |
| expansion | dilation whose scale factor is greater than 1 |
| scale factor | number that determines how big or small an object will get when dilated |
| contraction | dilation whose scale factor is smaller than 1 |
| center of dilation | every line passing through corresponding points on the image and the pre-image pass through this point |
