<P> The three ( possibly extended ) altitudes intersect in a single point , called the orthocenter of the triangle , usually denoted by H. The orthocenter lies inside the triangle if and only if the triangle is acute ( i.e. does not have an angle greater than or equal to a right angle ) . If one angle is a right angle , the orthocenter coincides with the vertex at the right angle . </P>
<P> The three ( possibly extended ) altitudes intersect in a single point , called the orthocenter of the triangle , usually denoted by H. The orthocenter lies inside the triangle if and only if the triangle is acute ( i.e. does not have an angle greater than or equal to a right angle ) . If one angle is a right angle , the orthocenter coincides with the vertex at the right angle . </P>
where do the altitudes of a triangle intersect
where do the altitudes of a triangle intersect
the orthocenter
the orthocenter