A = Point(xAxis)
C = Point(xAxis)
c = Circle(A, 5)
B, D = Intersect(c, yAxis)
Vieleck1, a, b, c_1, d = Polygon(A, B, C, D)
TextVieleck1: "Fläche " + (Name[A]) + (Name[B]) + (Name[C]) + (Name[D]) + " = " + Vieleck1