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Sine Rule Fillet

Illustrates smooth circular fillet between two non-concentric arcs

Application

For an arc radius r1 centred at the origin and an arc radius r2 centred at (x, 0), a suitable fillet by this method has:
  • radius
  • centre at the polar coordinates
A physical application is this 3D model for making a Parametric Assistive Pen Grip in OpenSCAD.