| A | B |
| Enlargment | An increase in dimensions of an object by a constant factor |
| Scale Factor | The constant factor by which all dimensions are enlarged or reduced in a scale drawing |
| Reduction | A decrease in the dimensions of an object by a constant factor |
| Scale | A comparison between the actual size of an object and the size of the diagram. It can be expressed as a ratio, fraction, percent, in words, or in a digram |
| Scale Diagram | a drawing that is similar to the actual figure or object. It can differ in size but must have the same proportions |
| Proportion | An equation that says that two ratios or two rates are equal. It can be written as a fraction or ratio |
| Corresponding angles | two angles that have the same relative position in two similar geometric figures |
| Corresponding sides | two sides that have the same relative position in two similar geometric figures |
| Similar | Same shape but different size - must have equal corresponding angles and proportional sides |
| Polygon | A 2 - dimensional closed figure made up of three or more line segments (a many sided shape) |