fy(x) = x^(2)
fx(x) = 0.5 * x * x * x
C = (-1.4086553619988413, -1.8615708650190017)
B = (1.580759913588367, -0.4327284220609022)
A = (-1.673217881306987, -0.8598481326171129)
Vieleck1, c, a, b = Polygon(A, B, C)
D = Point(c)
D': (fx(x(D)), fy(y(D)))
Ortslinie1 = Locus(D', D)
E = Point(a)
F = Point(b)
E': (fx(x(E)), fy(y(E)))
F': (fx(x(F)), fy(y(F)))
Ortslinie2 = Locus(F', F)
Ortslinie3 = Locus(E', E)
A': (fx(x(A)), fy(y(A)))
B': (fx(x(B)), fy(y(B)))
C': (fx(x(C)), fy(y(C)))