Zapněte stopu bodu H. Tahem za bod A vytvoříte hledanou množinu

S = Intersect(xAxis, yAxis)
A_1 = Point(xAxis)
k = Circle(S, A_1)
a = Segment(S, A_1)
A = Point(k)
C = Point(yAxis)
b = Segment(A, S)
T = OrthogonalLine(A, b)
e = Circle(A, 4)
H, E = Intersect(e, T)
h = Circle(H, A)
poly1, h_1, s, a_1 = Polygon(S, A, H)