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Formulary Radian measure


Radian measure, arc angle and diameter

The radian measure corresponds to the associated angle. The circular arc (b) has the same portion of the circumference (d · ), as the associated angle () has of the circumference-angle (360°).


Check your calculation!     You need help?
Please enter numbers only in two of the three fields!
d Diameter mm cm dm m
Angle ° (grad)
b Radian measure mm cm dm m
Places behind the comma: 2 3 4 5

Example

Geg.: d = 115 mm; = 25°

Ges.: b in m

Answer:

        d · ·
b =
        360°

  115 mm · 3,14 · 25°
=
        360°

= 25,08 mm


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