In fact, the hypotenuse is a line between two angles, so what is wrong with a fourth person being the hypotenuse between two of the three people who are presumably at the points of the triangle?

ECONOMIST: Letters

IR Since Mr Robinson is evidently a geometrically curious fourth line of a triangle, and the hypotenuse at that, please clarify which of the three esteemed ministers he is lying alongside (no innuendo please), and what are the policies or characteristics of the other two that have resulted in them lying at right angles to each other.

ECONOMIST: Letters