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Chapter 5 Ratio, Proportion, and Similar Figures Vocabulary
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Terms in this set (17)
Ratio
a comparison of two quantities by division
Rate
a ratio of two measurements having different units
Unit Rate
a rate simplified so that it has a denominator of 1
Complex Fraction
a fraction with a numerator and/or denominator that is also a fraction
Proportional
the ratios of related terms are equal
Constant of Proportionality
a constant ratio or unit rate of a proportion
Nonproportional
a relationship in which two ratios are not equal
Proportion
a statement of equality of two or more ratios
Cross Products
if a/c = b/d then ad = bc
Scale Drawing
a drawing that is used to represent an object that is too large or small to be drawn at actual size
Scale Model
a model used to represent an object that is too large or too small to be built at actual size
Scale
the relationship between the measurements on a drawing or model and the measurements of the real object
Scale Factor
the ratio of a length on a scale drawing or model to the corresponding length on the real object
Similar Figures
figures that have the same shape but not necessarily the same size
Congruent
line segments that have the same length, or angles that have the same measure, or figures that have the same size and shape
Corresponding Parts
parts of congruent or similar figures that match
Indirect Measurement
using the properties of similar triangles to find measurements that are difficult to measure directly
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