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In Delta ABC,r (r1+r2+r3)=...

In `Delta ABC,r (r_1+r_2+r_3)=`

A

`ab+bc+ca-s^2`

B

`ab-bc+ca-s^2`

C

`ab+bc-ca-s^2`

D

`ab+bc+ca+s^2`

Text Solution

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The correct Answer is:
A
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