Polygon

A polygon is a closed finite chain of line segments in a plane, with successive segments meeting at vertices of a polygon. In the usual simple case, nonadjacent sides of a polygon do not intersect and the chain bounds an interior region. A triangle has three sides, a quadrilateral four, and a hexagon six. A simple $n$-sided polygon has interior angle sum $(n-2)\pi$: splitting it into $n-2$ triangles explains the formula. A regular polygon has equal side lengths and equal interior angles. Self-intersecting regular star polygons require a separate convention for their interior and signed area.

Polygon is a protocol and framework for building and connecting Ethereum-compatible blockchain networks. It seeks to address some of the scalability issues faced by the Ethereum network by enabling the creation of Layer 2 scaling solutions. Originally known as Matic Network, it rebranded to Polygon in early 2021.