kuusnurga

Kuusnurga is the Estonian term for a hexagon, a polygon with six sides and six angles. In geometry the word refers to any six‑sided figure, and the phrase kuusnurga is often used for the general shape as well as for a specific six‑sided form when the sides are equal.

A regular kuusnurga has six equal sides and six equal interior angles of 120 degrees, giving a total of 720 degrees for the polygon. The shape is convex and highly symmetric, possessing six lines of symmetry and rotational symmetry of order 6. It is common to describe or analyze a regular kuusnurga using its circumscribed circle.

A key geometric property is that a regular kuusnurga can be inscribed in a circle; the distance from the center to any vertex is the circumradius. For a regular hexagon inscribed in a circle, each side length equals the radius of the circle. This relationship is convenient in computations and constructions.

Kuusnurgad appear in various contexts: they tile the plane in a regular hexagonal tiling, a pattern found in natural structures such as honeycombs and certain crystal lattices, and in design, tiling, and board games that use hex grids. The hexagonal form is valued for efficient packing and uniform adjacency.

Etymology: kuusnurga combines kuus (six) and nurk (corner) in Estonian. The root kuusnurk is commonly used, with kuusnurga serving as the form in standard phrases and descriptions.