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# Design Scale Models

### Vocabulary DE 4.2

TermDefinition
Scale Model a model of a figure or object in which each of the measurements are proportional to the original
corresponding sides the sides with the same relative position in two congruent figures; Corresponding sides of two similar figures have the same relative position and are proportional which means the ratios of the corresponding sides are equal.
scale drawing a proportional two-dimensional sketch of an object that accurately depicts the object examples: blue prints & maps (reduced images) , drawing of microscopic bacteria (enlargement)
scale factor the ratio of any two corresponding lengths in two similar figures
corresponding angles angles in the same relative position in two or more polygons that have an equal number of sides; Corresponding angles are on the same side of a line that intersects two lines.
scale (of a model) a ratio representing the constant of proportionality between a scale model and the actual figure that it represents. A scale is a ratio which is used to make a drawing that is smaller or larger than the actual object.
proportional relationship two variables are in a proportional relationship when the ratio of the quantities is always equivalent for any pair of corresponding values
constant of proportionality the value of the ratio between two proportional quantities ratio y/x or k
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