Assertion: triangle's orthocenter | /r/CapableOf | coincide with a vertex of the right angle
Facets:
Source sentences:
text: An orthocenter of an acute-angled triangle (point O, Fig.26) is placed inside of the triangle; and an orthocenter of an obtuse-angled triangle (point O, Fig.27) – outside of the triangle; an orthocenter of a right-angled triangle coincides with a vertex of the right angle.