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No. There are several systems of measurement. The classical one is degree, where 360 degrees correspond to a full circle, and a right angle has 90°. One degree is subdivided into 60 minutes, each minute in turn is subdivided in 60 seconds.

Mathematicians like to measure angles in radian. A full circle corresponds to 2 pi radian, where pi=3.1415..., and so a right angle corresponds to pi/2.

In some technical applications they use gon where a right angle is measured as 100 gon.

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13y ago

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