right angle

== English == === Etymology === Calque of Latin angulus rectus. === Pronunciation === === Noun === right angle (plural right angles) (geometry) Half of the angle formed by a single straight line, equivalent to 90 degrees. Coordinate terms: acute angle, obtuse angle (mathematics) An ∟ character. ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== === See also === perpendicular square T-square === Anagrams === range light