Question

how to draw geometry orthocentre​

Answer 1

Answer: For a more, see orthocenter of a triangle. 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. There are therefore three altitudes in a triangle. It works using the construction for a perpendicular through a point to draw two of the altitudes, thus location the orthocenter.

Geometry construction with compass and straightedge or ruler or ruler*Note If you find you cannot draw the arcs in steps 2 and 3, the orthocenter lies outside the triangle. See Orthocenter of a triangle.

To solve the problem, extend the opposite side until you can draw the arc across it