In any - ABC - 1- r 1-1- r 2-1- r 3 is equal toA- 3 - rB- 2 - rC- 1 - rD- 1

The correct option is C 1/r We have, 1/r_1+1/r_2+1/r_3=s a/Δ+s b/Δ+s c/Δ =3s (a+b+c)/Δ=3s 2s/Δ=s/Δ=1/r ...

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Ex Radius

In any Δ ABC ...

Question

In any $Δ A B C, \frac{1}{r_{1}} + \frac{1}{r_{2}} + \frac{1}{r_{3}}$ is equal to

3/r

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1/r

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2/r

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