90gradige

90gradige is an adjective used in Dutch and, in similar form, in German to describe something that relates to or possesses a right angle, i.e., an angle of 90 degrees. The term is formed from the concept of degrees (grad) and the Dutch suffix -ige (or the corresponding German -ige/-Winkel formation in compound nouns). It is commonly employed in technical writing to specify geometric properties.

In geometry, a right angle is created where two lines meet at exactly 90 degrees and are perpendicular to each other. The 90gradige designation applies to angles, lines, or shapes that include or require such a right angle. For example, a 90gradige hoek denotes a right-angle corner, a 90gradige lijn a line perpendicular to another, and a 90gradige vlak a plane containing a right angle with a reference line. In German usage, the equivalent forms are often written as 90-Gradige or 90-Grad-Winkel, while in Dutch the hyphenation 90-gradige is common in standard technical prose.

The term is primarily found in mathematical, architectural, and engineering contexts, including instruction, design specifications, and CAD documentation. In bilingual or international settings, the English term right-angle is frequently used as a direct translation. Beyond its descriptive function, the concept of a right angle underpins broader topics such as orthogonality, perpendicularity, and Cartesian coordinate systems, where 90-degree relationships define axis orientation and projection behavior. See also: right angle, perpendicular, orthogonality, geometry, CAD.