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If I is incentre of the triangle ABC, P(...

If I is incentre of the triangle `ABC, P_(1),P_(2),P_(3)` are radii of circum circles of `Delta^("le") IBC, ICA, IAB` respectively

A

`2P_(1)=a secA//2`

B

`2P_(2)=b secB//2`

C

`2P_(3)=c secC//2`

D

`P_(1)P_(2)P_(3)=2R^(2)r`

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abcd
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