# Rail turn

The curve radius on the railway line is 532 m . Length of rail track on it is 818 m. How many degrees is the angle ASB, if A and B are boundary points and S is center of arc curve.

Correct result:

ASB =  328.3 °

#### Solution:

$ASB=\frac{1438}{251}\cdot \frac{180}{\pi }\doteq 328.{3}^{\circ }=32{8}^{\circ }1{5}^{\mathrm{\prime }}8\mathrm{"}$

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