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In a Delta ABC, D,E and F respectively a...

In a `Delta ABC, D,E and F` respectively are the points of contact of the incircle with the sides AB, BC and CA such that `AD =alpha, BE= beta and CF =gamma," then "(alpha beta gamma)/(alpha +beta +gamma)=`

A

`R^(2)`

B

2R

C

2r

D

`r^(2)`

Text Solution

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The correct Answer is:
D
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