Geometry
Pythagorean Theorem
The Pythagorean Theorem is a fundamental principle in Euclidean geometry that establishes a relationship between the sides of a right-angled triangle.
Quincunx
Quincunx is a five-point arrangement with four points at the corners of a square or rectangle and a fifth at the center. The term originates in ancient Rome as the name of a bronze coin valued at five-twelfths of an as, and it has influenced fields from horticulture and architecture to statistics, cartography, computing, and astrology.