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In the following figure, AB = BC, AC = C...

In the following figure, AB = BC, AC = CD and `angleACD=90^(@)`. If the radius of the circle is 'r' units, then find the length of the chord BC.

A

`rsqrt(sqrt(2)-1)`

B

`rsqrt(sqrt(3)-1)`

C

`rsqrt(2-sqrt(2))`

D

`rsqrt(2-sqrt(3))`

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