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     EduGorilla 
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    The sides of triangle ABC are a cm, b cm and c cm. The sides of triangle DEF are d cm, e cm and f cm. If a2 + b2 + c2 + d2 + e2 + f2 = 2ad + 2be + 2cf, then which of the following is true?

    Options :-

    1. Triangles ABC and DEF are equilateral.
    2. Triangles ABC and DEF are right angled.
    3. Triangles ABC and DEF are congruent.
    4. Triangles ABC and DEF are scalene w.r.t each other
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Reply To: The sides of triangle ABC are a cm, b cm and c cm. The sides of triangle DEF are d cm, e cm and f cm….
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