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Chapter 6 Vocabulary
| Word | Definition |
|---|---|
| ratio | a comparispn of two numbers using division |
| proportion | an equation that states that two ratios are equal |
| extreme | the first and last terms of a proportion |
| geommetric mean | for 2 positive numbers a and b, the positive number x that satifies a/x = x/b. so x(2)= ab and x= sqrt. of ab. |
| scale drawing | a drawing that is the same shape as the object it represents |
| scale | a ratio that describes how the demensions in a scale drawing are related to the actual demensions of the object |
| similar polygons | two polygpns such that their corresponding angles are congruent and the lengths of the corresponding sides are proprotional |
| scale factor of two similar polygons | the ratio of the lengths of two corresponding sides of two similar polygons |
| dilation | a transformation that stretches of a shrinks a figure to create a similar figure |
| center of dilation | in a dilation, the fixed point about which the figure in=s enlarged or reduced |
| scale factor of a dilation | in a dilation the ratio of a side length of the image to the correponding side length of the original figure |
| reduction | a dilation with a scale factor between 0 and 1 |
| enlargement | a dilation with a scale factor greater than 1 |
Created by:
softballchick7309
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