keskuskulma

Keskuskulma is a Finnish term that translates to "central corner" or "central angle" in English. It most commonly refers to a specific geometric concept. In geometry, a central angle is an angle whose apex (vertex) is the center of a circle and whose sides are radii that intersect the circle at two distinct points. These two points define an arc on the circle. The measure of a central angle is equal to the measure of its intercepted arc. For example, a semicircle is intercepted by a central angle of 180 degrees.

The concept of the central angle is fundamental in understanding various properties of circles, including circumference, area, and the relationships between angles and arcs. It is used in trigonometry and in calculating areas of sectors. The term "keskuskulma" is directly used in Finnish mathematics education and texts when discussing these geometric principles. Beyond its strict geometric definition, the term can occasionally be used metaphorically in Finnish to describe a significant or pivotal point in a discussion or situation, though this usage is less common and more context-dependent than its geometric meaning.