Rettekanter

Rettekanter is a Danish term that translates to "right angles" in English. It refers to the geometric angle formed by two lines or planes that intersect perpendicularly, measuring exactly 90 degrees. This fundamental concept in geometry is crucial for understanding shapes, spatial relationships, and measurements.

In two-dimensional geometry, a right angle is a common feature of rectangles, squares, and other polygons. For instance, all four interior angles of a square are right angles. The presence of right angles often simplifies calculations related to area, perimeter, and diagonals. The Pythagorean theorem, a cornerstone of Euclidean geometry, is directly applicable to right-angled triangles, relating the lengths of their sides.

In three-dimensional space, right angles are formed between intersecting lines or planes. For example, the edges of a cube or a rectangular prism meet at right angles. The concept is also vital in fields such as architecture, engineering, and design, where precise construction and alignment rely heavily on the accurate formation of right angles. Measurements involving perpendicularity, such as determining the height of an object from its base, often involve right angles. The symbol for a right angle is a small square placed at the vertex of the angle.