5G-s-P8   4^th 5G-Hung’s Point

Let A₁A₂A₃A₄A₅ be a Pentagon.

Taking subscripts modulo 5, we denote, for i = 1, 2, . . . , 5:

L_i = Line(A_i-1, A_i+1).

C_i = Circle(A_i-1, A_i+1, L_i-2^L_i+2) with center P_i. (black circles in picture)

S_i = 2^nd intersection point of circles C_i-1^C_i+1.

D_i = Circle(S_i, L_i+1^L_i+2, L_i-1^L_i-2) with center Q_i. (blue circles in picture)

Then lines P_i.Q_i will be concurrent in 5G-s-P8 for i = 1, … , 5.

This point was found by Tran Quang Hung. See [66], QPG-messages #631 and #634.

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