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2014-07-13T12:15:11+05:30

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SSS - SIDE,SIDE,SIDE
means you have to prove that two triangles 3 sides are equal
SAS - SIDE,ANGLE,SIDE
you have to prove two sides and one angle is equal for the two triangles
 
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there is no prove
there are axioms
its just considered
for example who can easily get that if the sides of a triangle are 3cm ,4cm and 5cm is congruent with a triangle with side 3cm ,4cm and 5cm
we have questions in exam like- If in 2 triangles, the sides are proportional to the sides of other triangle then prove that the correspondings angles are equal and the 2 triangles are similar.