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math - vocab: unit 4
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Terms in this set (18)
congruent
line segments that have the same length, or angles that have the same measure, or figures that have the same size and shape
constant of proportionality
a constant ratio or unit rate of a proportion
corresponding parts
parts of a congruent or similar figures that match
cross products
if a/c=b/d, then ad=bc; if c/b=a/d, then cb=ad
dilation
a transformation that alters the size of a figure but not its shape
dimensional analysis
the process of including units of measurement when computing
indirect measurement
using the properties of similar triangles to find measurements that are difficult to measure directly
nonproportional
a relationship in which two ratios are not equal
proportion
a statement of equality of two or more ratios
proportional
the ratios of related terms are equal
rate
a ratio of two measurements having different units
ratio
a comparison of two numbers by division
scale
the relationship between the measurements on drawing or model and the measurements of a real object
scale drawing
a drawing that is used to represent an object that is too large or too small to be drawn at actual size
scale factor
the ratio of a length on a scale drawing or model to the corresponding length on the real object
scale model
a model used to represent an object that is too large or too small to be built at actual size
similar figures
figures that have the same shape but not necessarily the same size
unit rate
a rate simplified so that it has a denominator of 1
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