ristküljel
Ristküljel is the Estonian term used in geometry to denote the rectangle, a four‑sided plane figure defined by four right angles. In standard Estonian geometry vocabulary, the shape is usually called ristkülik, while ristküljel appears in grammatical contexts such as attributive or locative phrases (for example, “ristküljel pindala” meaning the area of a rectangle).
In Euclidean geometry, a rectangle is a parallelogram with four right angles. Opposite sides are equal and
In Estonian usage, common phrases include ristküliku pindala (area of a rectangle), ristküliku ümbermõõt (perimeter of
The rectangle is one of the basic quadrilaterals in geometry and serves as a fundamental example of