Assertion: triangle | /r/HasProperty | formed
Facets:
Source sentences:
text: Critics have argued that it is actually very difficult to know where these triangles will be formed, as objects (including large, heavy objects) often move around during earthquakes.
text: Four points in the plane, such that one of them is the orthocenter of the triangle formed by the other three, is called an orthocentric system or orthocentric quadrangle.