A = Intersect(xAxis, yAxis)
B = Point(xAxis)
poly1, a_1, b, c_1, d, C, D = Polygon(A, B, 4)
J = Midpoint(D, C)
I = Midpoint(B, C)
e = Segment(I, A)
f = Segment(A, J)
a = Angle(I, A, J)
c: cos(a)