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Classification of Triangles Based on Their Angles

Prove that th...

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Prove that the sides of the orthic triangle meet the sides of the given triangle in three collinear point

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ABD is inscribed in a circle.Poit P lies on the circumscribed circle of a traingle be such that through point P. PN,PM and PL are perpendicular on sides of triangle (possibly by increasing sides).Prove that points N,M,L are collinear.

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Classification of Triangles Based on Their Angles

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