排列組合與機率統計(11)
Author: 藍邦偉　老師

n = 0 (slider from 0 to 11, step 1)
A = (-7.332571199999997, -1.4459017756097512)
B: A + (3.2, 0)
D: A + (0, 1)
C: B + D - A
poly1, a, b, c, d = Polygon(A, B, C, D)