Again with the center of the hexagon chart at “ 1 ” notice that 7 , 19 , 37 , 61 , 91 , 127 , 169 , 217 , 271 , 331 , and 397 are all on this direct angle and are important points in time measurement 注意在六边形上360度的数字，它代表一个360度的循环终结的位置。
2.
Through the use of the multivalued directed angle and its related notions , it is given the sufficient and necessary conditions when the three chordal circles based on the three sides of a triangle as their chords share the same point 摘要利用多值有向角及其相关概念，给出了以三角形每边为弦各作一圆所得三圆共点的充要条件，推广了已有结论。
