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wholesale body jewelry near me 1. RAD means arc. The round heart angle of the 1/360 of the circular week is called 1 °, 1 ° = 60 points (1 ° = 60 ′), 1 point is 60 seconds (1 ′ = 60 ″). The unit system of the measurement angle of the unit is called the angle system.
2. Because the angle system is 60 entry system, it is often encountered in the case of the unit conversion when calculating the two corners. Therefore In scientific research, another method of measurement angle is used: the rounded corner of the arc that is equal to the long radius is called 1 arc angle, and the calculation formula for
3, arc The arc length is the radius. When the arc represents the angle, it can usually omit the writing of "arc" or "RAD", then each arc corresponds to a real number. The arc of the 180 ° angle is.
When the angle is represented by the arc system, it can usually be omitted by the writing of the unit "arc" or "RAD", for example, it can be recorded separately.