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If ABC is a quarter circle and a circle ...

If ABC is a quarter circle and a circle is inscribed in it and if AB = 1 cm, find radius of the smaller circle.

A

`sqrt2-1`

B

`(sqrt(2)+1)//2`

C

`sqrt(2)-1//2`

D

`1-2sqrt(2)`

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The correct Answer is:
A
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