In a triangle ABC, BO and CO are the angle Bisectors of external angles B and external angle C, prove that angle O = 90°- (1/2) angle A.

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Most important question from Triangles.

Example 8, Chapter Triangles, Class 9.

In a triangle ABC, BO and CO are the angle Bisectors of external angles B and external angle C, prove that   angle O = 90°- (1/2) angle A.

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Deepak Rajoria
Focus Classes

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