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				   In a triangle ABC and R is the radius of the circle into which the  triangle is inscribed(in other words it is the circum radius of the  triangle)    then prove it is an equilateral triangle


6 years ago

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										Dear ankit,
we know that . Multiply out the left side to get . Thus the equation becomes , which you can write as . That obviously only holds if .

We are all  IITians and here to help you in your IIT  JEE preparation.  All the best.

Sagar Singh
B.Tech IIT Delhi
sagarsingh24.iitd@gmail.com


6 years ago

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