9 terms

# Vocab for Triangles/Similar

Chapter # 9 plus dilation
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Ratio
a comparison of two numbers by division
Proportion
an equation that states that two ratios are equivalent
Scale
the ratio between the size of something and a representation of it
Scale Factor
The ratio of the lengths of two corresponding sides of two similar polygons.
Scale Drawing/Model
used to represent an object that is too large or too small to be drawn or built at actual size
Similar Polygons
Two polygons whose corresponding angles are congruent and whose corresponding sides are proportional.
Dilation
A transformation that changes the size of an object, but not the shape.
Similarity
An object that has the same shape but not the same size
Nonrigid Transformation
a transformation that does not preserve the size of the original figure, such as a dilation by a scale factor other than zero or one

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