f(x) = ℯ^((1 / 2 * x))
a = Surface(t, ((s * 1 / 2) * f(t)), (s * f(t) / sqrt(2)), t, 0, 1, s, 0, 1)
b = Surface(t, (1 / 2 * f(t)) + (((1 - s) * 1 / 2) * f(t)), (s * f(t) / sqrt(2)), t, 0, 1, s, 0, 1)
c = Surface(0, (s * f(0) / 2), ((s * f(0) / sqrt(2)) * t), t, 0, 1, s, 0, 1)
d = Surface(0, (s * f(0) / 2) + f(0) / 2, (((1 - s) * f(0) / sqrt(2)) * t), t, 0, 1, s, 0, 1)
e = CurveCartesian(t, (1 / 2 * f(t)), f(t) / sqrt(2), t, 0, 1)
g = 0.5 (slider from 0 to 1)
P: (g, 0)
P_1: (x(P), f(x(P)))
P_2: (x(P), (1 / 2 * f(x(P))), f(x(P)) / sqrt(2))
k1, p_2, p, p_1 = Polygon(P, P_1, P_2)