Hi,
The orthocenter in an obtuse triangle is outside. To make this happen the altitude lines have to be extended so they cross.
Hope this answers your question!
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An orthocenter on an obtuse triangle actually lies outside of the triangle. In an acute triangle, the orthocenter lies within the triangle.
When you have and obtuse triangle and you are trying to find the Orthocenter
inside-acute,on the triangle-right,outside-obtuse
The orthocenter of a triangle is the point where the altitudes of the triangle intersect. It may lie inside, outside, or on the triangle depending on the type of triangle. In an acute triangle, the orthocenter lies inside the triangle; in a right triangle, it is at the vertex opposite the right angle; and in an obtuse triangle, it is outside the triangle.
Obtuse triangle! To make this happen the altitude lines have to be extended so they cross.Hope this helps!