also: さしがた
noun, noun which may take the genitive case particle 'no'
Technical term for a rectangle, often used in mathematics and geometry. In everyday language, 長方形 is more common.
See also: 長方形
この図形は矩形です。
This shape is a rectangle.
矩形の面積を計算してください。
Please calculate the area of the rectangle.
矩 means 'carpenter's square' or 'rule', and 形 means 'shape'. Together they denote a shape with right angles, i.e., a rectangle.