figure eight is the 5 circles in the olympics.
figure eight is the 5 circles in the olympics.
what are the 5 circles in the olympics?
figure eight
Na
Na
yang hui's magic circle series was published in his "xugu zhaiqi suanfa"《續古摘奇算法》 (sequel to excerpts of mathematical wonders) of 1275. his magic circle series includes: magic 5 circles in square, 6 circles in ring, magic eight circle in square









































magic concentric circles, magic 9 circles in square.









































section::::yang hui magic circles.:yang hui magic concentric circle.









































yang hui's magic concentric circle has the following properties









































bullet::::- the sum of the numbers on four diameters = 147，









































bullet::::- 28 + 5 + 11 + 25 + 9 + 7 + 19 + 31 + 12 = 147









































bullet::::- the sum of 8 numbers plus 9 at the center =147;









































bullet::::- 28 + 27 + 20 + 33 + 12 + 4 + 6 + 8 + 9 = 147
magic circle (mathematics)