.圆的等分系数K值圆的等分系数也叫等分圆周直径系数。是已知圆的直径，求圆内接正边形边长（即弦长）时，所利用到的一个参数。(直径K=弦长）等分数-K值3-0.86603 4-0.70711 5-0.587799 6-0.50000 7-0.43388 8-0.38268 9-0.34202 10-0.30902 11-0.28173 12-0.25882 13-0.23932 14-0.22252 15-0.20791 16-0.19509 17-0.18375 18-0.17365 19-0.16459 20-0.15643 21-0.14904 22-0.14231 23-0.13617 24-0.13053 25-0.12533 26-0.12054 27-0.11609 28-0.11196 29-0.10812 30-0.10453 31-0.10117 32-0.09802 33-0.09506 34-0.09227 35-0.08964 36-0.08716 37-0.08481 38-0.08258 39-0.08047 40-0.07846 4
