Outrageously Funny Word Dictionary :: Pentalogy

👉 In mathematics, a pentalogy is a set of five distinct points in a plane that form a regular pentagon. It is named after the Greek mathematician Pappus. Pappus' pentalogy has been used to solve many problems in geometry and trigonometry. The five points are also known as the five points of concurrence, which are the points where the lines through four given points intersect each other. In a regular pentagon, all 5 sides are equal,

pentalogy