rektangulære

Rektangulære is the Norwegian adjective meaning rectangular. It describes objects or shapes that have the form of a rectangle, a four‑sided polygon with four right angles. In Norwegian, the noun for the shape is rektangel.

Geometrically, a rectangle is a parallelogram with four right angles. Opposite sides are parallel and equal in length. The diagonals are equal in length and bisect each other. The area is the product of its length and width (A = l × w), and the perimeter is 2(l + w). A square is commonly treated as a special case of a rectangle, since it also has four right angles, though some contexts distinguish squares as a separate category.

Rectangular figures can be axis-aligned, with sides parallel to the coordinate axes, or rotated. The fundamental area and perimeter formulas apply to all rectangles, regardless of orientation. In coordinate geometry, a rectangle can be defined by four corner points with successive edges perpendicular.

Applications and usage: the term appears across disciplines, including design, architecture, and engineering, where objects such as rektangulære bordplater, vinduer, eller rom are described as rectangular. In computing and graphics, rectangular shapes are common for screens, images, and bounding boxes (rektangulære områder). The versatility of rectangles makes the rektangulær form a basic building block in both theoretical and applied contexts.

Etymology: the adjective rektangulær stems from the geometric concept of rektangel (rectangle) and reflects Latin/French influences that entered Norwegian.