Ms. Garcia Math
Proportion
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A statement that two ratios are equal
The following proportion can be stated as: "
a is to b as c is to d
." This can also be written in frational form as
a/b=c/d
Cross Product
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The product of the numerator of one fraction and the denominator of the other fraction.
To be a proportion the cross products must be equal
Ex. The ratio of dogs to cats is 3 to 2. If there are 10 cats, how many dogs are there?
Similar figures
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When two figures are similar, the ratios of the lengths of their corresponding sides are equal.
Scale factor
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Is the ratio of the two respective sides of two similar figures