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en.wikipedia.org/wiki/Similarity_(geometry)

This article assumes that a scaling can have a scale factor of 1, so that all congruent shapes are also similar, but some school textbooks specifically exclude congruent triangles from their definition of similar triangles by insisting that the sizes must be different if the triangles are to qualify as similar.

study.com/.../lesson/similar-figures-definition-examples.html

Similar figures show up quite often in the world around us. In this lesson, we will discuss similar figures and their properties. At the end of the lesson, you can test your knowledge with a quiz.

www.icoachmath.com/math_dictionary/similar-figures.html

Similar figures are figures that have the same...Complete information about the similar figures, definition of an similar figures, examples of an similar figures, step by step solution of problems involving similar figures. A

tutors.com/math-tutors/geometry-help/similar-figures

Understanding how similar figures work, and seeing relationships between similar figures, can help you in both geometry and real-world applications. The most common way to use similar figures is ages old: knowing the size of a small figure can help you estimate the size of a larger, unknown measurement.

www.dictionary.com/browse/similar

Similar definition, having a likeness or resemblance, especially in a general way: two similar houses. See more. ... geometry (of two or more figures) having corresponding angles equal and all corresponding sides in the same ratio Compare congruent (def. 2) maths (of two classes) equinumerous.

www.reference.com/math/similar-mean-math-db59ebdf738b48fb

What Does Similar Mean in Math? Similar is a term used in math when discussing geometric figures or shapes, and it means that both figures' corresponding sides are proportional, but the figures themselves are two different sizes. ... definition of similar shapes in math similar figures math definition similar shapes math similar math definition ...

www.mathsisfun.com/geometry/similar.html

If there is no need to resize, then the shapes are better called Congruent*.. There may be Turns, Flips or Slides, Too! Sometimes it can be hard to see if two shapes are Similar, because you may also need to turn, flip or slide a shape.

www.mathsisfun.com/definitions/similar.html

Illustrated definition of Similar: When one shape can become another after a resize, flip, slide or turn. These two shapes are similar (one is...