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In A B C , if r\ : r1: R=2\ : 12\ :5, w...

In ` A B C` , if `r\ : r_1: R=2\ : 12\ :5,` where all symbols have their usual meaning, then ` A B C` is an acute angled triangle ` A B C` is an obtuse angled triangle ` A B C` is right angled which is not isosceles ` A B C` is isosceles which is not right angled

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