The x co-ordinate of the incentre of the...

The x co-ordinate of the incentre of the triangle that has the co-ordinates of mid points of its sides as (0, 1) (1, 1) (1, 0) is

A

`2+sqrt(2)`

B

`2-sqrt(2)`

C

`1+sqrt(2)`

D

`1-sqrt(2)`

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The correct Answer is:

B

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