If `I` is the incenter of `Delta ABC and R_(1), R_(2), and R_(3)` are, respectively, the radii of the circumcircle of the triangle IBC, ICA, and IAB, then prove that `R_(1) R_(2) R_(3) = 2r R^(2)`

If I is the incenter of A B Ca n dR_1, R_2,a n dR_3 re, respectively, the radii of the circumcircles of the triangles I B C ,I C Aa n dI A B , then prove that R_1R_2R_3=2r R^2dot

If I is the incenter of A B Ca n dR_1, R_2,a n dR_3 re, respectively, the radii of the circumcircles of the triangles I B C ,I C Aa n dI A B , then prove that R_1R_2R_3=2r R^2dot

O is the circumcenter of bigoplus ABC and R_(1),R_(2),R_(3) are respectively,the radii of the circumcircles of the triangle OBC,OCA and OAB.Prove that (a)/(R_(1))+(b)/(R_(2))+(c)/(R_(3)),(abc)/(R_(3))

O is the circumcentre of the triangle ABC and R_(1), R_(2), R_(3) are the radii of the circumcircles of the triangles OBC, OCA and OAB respectively, then a/R_(1) + b/R_(2) + c/R_(3) is equal to

O is the circumcentre of the triangle ABC and R_(1),R_(2),R_(3) are the radii of the circumcirclesof the triangles OBC,OCA and OAB respectively,then (a)/(R_(1))+(b)/(R_(2))+(c)/(R_(3)), is equal to

In any Delta ABC, prove that r.r_(1).r_(2).r_(3)=Delta^(2)

If in a triangle ABC, r_(1)=2, r_(2)=3 and r_(3) =6 then b=