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Geometry - Triangles - similarity and congruence
Triangles - similarity and congruence
We keep separate in our minds:
* the shape of a triangle, which is set by its angles; and
* the size of a triangle, which is set by its side lengths.
If two triangles have the same shape but are different sizes they are
called similar triangles. [1]
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[1] http://alison.com/#