A new triangular 'passenger plane' of the future is ready and has already undergone test flights. But the aircraft which NASA hopes will become a dominant design within the next 20 years, may come as ...

To illustrate the Pythagorean Theorem, makers of geometric models have long made models with pieces that could be arranged either as a square with a side equal to the length of the hypotenuse of a ...

Many inequalities involving notable points and lines in the plane of a triangle ABC are presented. Most are new; however, they are only conjectured, not proved. Each inequality was detected by ...