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The triangle formed by joining the three...

The triangle formed by joining the three excentres `I_1, I_2 and I_3`, of `Delta ABC` is called the excentral orexcentric triangle and in this case internal angle bisector of triangle `ABC` are the altitudes of triangles `I_1I_2I_3` Incentre `I` of `DeltaABC` is the ......... of the excentral `DeltaI_1I_2I_3`.

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The triangle formed by joining the three excentres I_(1),I_(2) and I_(3) of Delta ABC is called the excentral orexcentrictriangle and in this case interal angle bisector of triangle ABC are the altitudes of triangles I_(1)I_(2)I_(3) Incentre I of Delta ABC is the ......... of the excentral Delta I_(1)I_(2)I_(3).

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