How to construct (draw) the orthocenter of a triangle- Math Open Reference

How to construct the orthocenter of a triangle with compass and straightedge or ruler. The orthocenter is the point where all three altitudes of the triangle intersect. An altitude is a line which passes through a vertex of the triangle and is perpendicular to the opposite side. A Euclidean construction

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10 Conclusion: Therefore, ∠í µí±„í µí±€í µí°µ = 45° (iv) Construction