CONGRUENCE

Congruence

In geometry, two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other. More formally, two sets of points are called congruent if, and only if, one can be transformed into the other by an isometry, i.e., a combination of rigid motions, namely translations, rotations and reflections. This means that either object can be repositioned and reflected so as to coincide precisely with the other object. So two distinct plane figures on a piece of paper are congruent if we can cut them out and then match them up completely. Turning the paper over is permitted.

The above text is a snippet from Wikipedia: Congruence (geometry)
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congruence

Noun

  1. The quality of agreeing or corresponding; being suitable and appropriate.
  2. a relation between two numbers indicating they give the same remainder when divided by some given number
  3. being isometric — roughly, the same size and shape
  4. more generally: any defined on an which is preserved by defined by the structure


The above text is a snippet from Wiktionary: congruence
and as such is available under the Creative Commons Attribution/Share-Alike License.

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