On Impossible Figures [or On Evans' (Most) Impossible Triangle]

Regardless of the type or number of arguments that can be leveled at a demonstration of the possibility of trisecting the angle, a triangle composed of three identical parts constructed using a straight edge and a pair of compasses alone (by, for instance, constructing a triangle T and then copying it to the left and right) must surely be exactly what a successfully trisected general angle looks like. In can be difficult to understand how a geometric figure producible on a piece of paper is impossible to produce.

On Martian Mathematics

Q: What might a Martian [from 'War of the Worlds I' (with a 'Primary-3' vision system')] find funny?

A: Watching human television programmes about The Four-Colour Theorem.