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In any triangle ABc, r(1)r(2)+r(2)r(3)+r...

In any triangle `ABc, r_(1)r_(2)+r_(2)r_(3)+r_(3)r_(1)=`

A

`(Delta^(2))/(r^(2))`

B

`(Delta)/(r)`

C

`(2Delta)/(r)`

D

`Delta^(2)`

Text Solution

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The correct Answer is:
A
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