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Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
cross products   are found by multiplying the denominator of one ratio by the numerator of the other ratio  
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equivalent ratios   two ratios that name the same number  
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indirect measurement   uses proportions and similar triangles to measure distances that would be difficult to measure directly  
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polygon   a closed plane figure formed by three or more line segments that do not cross  
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proportion   an equation stating that two ratios are equal  
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rate   a ratio that compares two quantities measured in different units  
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ratio   a comparison of two quantities by division  
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scale   is the ratio that compares a length in a drawing to the corresponding length in the actual object  
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scale drawing   is an enlarged or reduced drawing of an object that is similar to the actual object  
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similar polygons   two polygons if corresponding angles have the same measure and the lengths of their corresponding sides are proportional  
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unit cost   a unit rate that gives the cost per unit  
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unit rate   the rate for one unit of a given quantity  
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