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In any triangle ABC, r1r2+r2r3+r3r1=...

In any triangle ABC, `r_1r_2+r_2r_3+r_3r_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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