Lförmig

Lförmig is a term used to describe a form that is shaped like the letter L: two perpendicular limbs that meet at a corner to form an elbow-like outline. While commonly found in German-language usage, the concept is widely used in geometry, architecture, and design to denote an orthogonal, concave shape.

In geometry, an L-shaped figure is an orthogonal polygon with edges that align to a common axis and with a single reflex interior angle of 270 degrees. The shape can be viewed as the union of two rectangles that meet at the inner corner, creating a distinct concave notch. Because of this, properties such as area can be computed by decomposing the figure into simpler parts.

In tiling and combinatorics, L-shaped forms appear as polyominoes. An L-tromino consists of three unit squares arranged in an L configuration, and an L-tetromino consists of four unit squares in a similar arrangement. More generally, larger L-shaped polyominoes are studied in discrete geometry and related tiling problems.

In practical contexts, L-shaped forms are common in architecture, interior design, and urban planning. An L-shaped room or building footprint maximizes corner space and can influence flow, lighting, and acoustics. L-shaped furniture and countertops are used to fit into corner areas and create functional work or seating zones. The term L-förmig or L-form is thus a versatile descriptor across disciplines for any object or plan adopting this characteristic elbow shape.