2 sides in same ratio and included angle all angles 3 sides in same ratio Triangles are similar if they are the same shape, with the same angles and proportions, but not necessarily the same size.
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Triangles are similar if they have the same shape (can be different sizes). As long as they are the same shape, one can be rotated or bigger than the other.
why triangle are similar
Not always, sometimes two obtuse triangles are similar and sometimes they are not similar.
dialating
The triangles are similar, but not necessarily congruent.