Make a curve be exactly a perfect slice of a circle I've a curve which is part of a train track. I would like to make this piece a perfect "slice" of a circle. Is this possible? 

I'm really new to Blender and modelling (in general), so I'm sorry if this is an easy task.

Here's the code:


  http://pastebin.com/p0cKF7ED


Note the object should still be a mesh of triangles (triangulated).

As you can see from the following picture:


the curve is not totally and exactly in the circle.

Any help is appreciated.
Try the following: 


Model the train Rail as linear, uncurved Shape.
Insert a Circle with add-mesh-Circle. Use the Number of verts as a multiplier of 360 degrees,  e.g. 36 verts.
Delete as many verts as you Need until you geht the Desired bow.
In Object Mode,  use Alt+c to convert the Circle bow Into a Curve. 
Apply a Curve modifier to the linear Rail from 1., Using the curve from 4. as Curve. 


Be aware of that both objects Need to have applied scale,  rotation and Location.

I Hope this Helps. 

Kind regards,  Karl Andreas Groß