![]() According to the meaning of “Supplere,” which is to supply, and “Plere” means to fill, we get “when something is supplied to complete a thing.” Now let’s gather all the puzzle pieces and form a precise definition. The word supplementary has its roots in Latin as a combination of words, “Supplere” and “Plere.” The meaning of these two words will set the foundation for the definition of supplementary angles. However, the symbol rad is used to denote radian. A radian is SI derived unit of an angle, where one radian is defined as an angle whose vertex is the center of a circle, while the rays expand, creating an arc whose length equals the radius of a circle.A degree (° the degree symbol) is a measurement of an angle, and it represents \frac of a circle. ![]()
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