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In a triangle ABC, a=3,b=4, c=5, then th...

In a triangle `ABC, a=3,b=4, c=5,` then the value of `(rr_(1)r_(2)r_(3))/6` is _____________

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The correct Answer is:
6
`:' rr_(1)r_(2)r_(3)=Delta^(2)`
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