-0.707106781186548
-1.4142135623731
0.707106781186548
1.4142135623731
x1 = -0.7071067811865448 y1 = -1.414213562373097
x2 = -0.7071067811865475 y2 = -1.414213562373095
x3 = 0.7071067811865475 y3 = 1.414213562373095
x3 = 0.7071067811865475 y3 = 1.414213562373095