The circle does not necessarily need to touch the fitting lines nor is its centre necessarily on the wedge Angle bisector.
圆圈，纷歧定需求以接触拟合直线也必然是此中心的楔角等分线。
2
The wedge angle bisector gives as intersection with the cutting edge profile point pint. (3) Draw a circle that intersects point pint and is tangent to both straight fitting lines.