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prove AAA, SSS, SAS similarity theorems

Please refer the study material for the same.

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AAA similarity theorem or criterion: If the corresponding angles of two triangles are equal, then their corresponding sides are proportional and the triangles are similar.

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In DABC and DPQR, ,  and  then  and DABC ∼ DPQR
SSS similarity theorem or criteria: If sides of one triangle are proportional to the sides of the other triangles, then their corresponding angles are equal and the triangles are similar.
In DABC and DDEF,   then,  and  and DABC ∼ DDEF

SSS similarity theorem or criteria

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SAS similarity theorem or criteria: If one angle of a triangle is equal to one angle of the other triangle and the sides including these angles are proportional, then the triangles are similar.
In DABC and DDEF,   and then  DABC ∼ DDEF

SAS theorem, SAS similarity theorem, SAS similarity criteria, similarity of triangles, similar figures, similarity criteria, similar triangles when included angles are equal and two sides are proportional

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 very bad and worse site

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 sss

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SSS:http://goo.gl/eKsIas

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