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In the given figure, ABC is a right tria...

In the given figure, ABC is a right triangle inscribed in a circle of radius R. If r is the inradius, a is the sagitta of chord BC and b is the Sagitta of chord AB. Find R & r in terms of a & b.

A

`sqrt(2ab)`

B

`2sqrt(ab)`

C

`(ab)/(a+b)`

D

None of these

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