NGon angle become larger than expected when its startAngle or endAngle are almost on vertices of regular polygon.
example: startAngle==-12 or endAngle==-336 on numSides=60.
In test case 02_NGon_Test, It is expected that the three fan shapes (red, green. blue) will be almost overlapped. But the red fan angle become larger with unfixed code. This also occurs in the case of arcs.
NGon angle become larger than expected when its startAngle or endAngle are almost on vertices of regular polygon.
example: startAngle==-12 or endAngle==-336 on numSides=60.
In test case 02_NGon_Test, It is expected that the three fan shapes (red, green. blue) will be almost overlapped. But the red fan angle become larger with unfixed code. This also occurs in the case of arcs.