Neliakso

Neliakso is a Finnish word that translates to "quadrangle" or "four-sided figure" in English. It refers to a geometric shape with four sides and four angles. This general term encompasses a variety of specific shapes, each with its own unique properties. The most common types of neliakso include squares, rectangles, parallelograms, rhombuses, trapezoids, and kites.

A square is a special type of neliakso where all four sides are equal in length and all four angles are right angles (90 degrees). A rectangle also has four right angles, but its adjacent sides can be of different lengths, with opposite sides being equal. A parallelogram is a neliakso where opposite sides are parallel and equal in length, but its angles are not necessarily right angles. A rhombus is similar to a parallelogram but has all four sides equal in length, with opposite angles being equal. A trapezoid is defined by having at least one pair of parallel sides, while a kite has two distinct pairs of equal-length adjacent sides. The study of neliakso forms a fundamental part of Euclidean geometry, with their properties being explored and utilized in various mathematical and practical applications, from architecture and design to physics and engineering.