三角測量  隔著湖測建築物寬度
Author: 藍邦偉  老師

由湖邊A,B兩點，測對岸C,D兩點的距離。

三角測量

A = (0.12, -2.2600000000000002)
C = (-3.04, 0.9400000000000001)
D = (8.56, 1.08)
a = Segment(C, D)
b = Segment(C, A)
c = Segment(A, D)
α = Angle(A, C, D)
β = Angle(C, D, A)
B = (6.16, -2.36)
g = Segment(C, B)
h = Segment(B, D)
γ = Angle(D, C, B)
δ = Angle(C, D, B)