Chapter 6 Vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| ratio | a comparispn of two numbers using division
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| proportion | an equation that states that two ratios are equal
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| extreme | the first and last terms of a proportion
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| 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.
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| scale drawing | a drawing that is the same shape as the object it represents
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| scale | a ratio that describes how the demensions in a scale drawing are related to the actual demensions of the object
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| similar polygons | two polygpns such that their corresponding angles are congruent and the lengths of the corresponding sides are proprotional
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| scale factor of two similar polygons | the ratio of the lengths of two corresponding sides of two similar polygons
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| dilation | a transformation that stretches of a shrinks a figure to create a similar figure
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| center of dilation | in a dilation, the fixed point about which the figure in=s enlarged or reduced
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| 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
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| reduction | a dilation with a scale factor between 0 and 1
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| enlargement | a dilation with a scale factor greater than 1
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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