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Similar Triangles Panašūs trikampiai Similar Triangles • Triangles are similar if they have the same shape, but not necessarily the same size • These triangles are all similar: http://www.mathsisfun.com/geometry/triangles-similar.html What is true about the angles of similar triangles? Answer: They are congruent (sutampantys) What is true about the sides of similar triangles? • Answer: The corresponding sides are proportional. What is the similarity ratio? Answer: It's the ratio between the corresponding sides. How to Find if Triangles are Similar? • Two triangles are similar if they have: – all their angles equal; – corresponding sides are in the same ratio. There are three ways to find if two triangles are similar: AA, SAS and SSS
