三角測量(20)
Author: 藍邦偉  老師

小潔身高170公分，欲測量正前方大樹數的高度。在C點測得仰角α，前進x公尺到B點測得仰角β。

三角測量(20)

A = (-2, -0.62)
a: x = x(A)
B = Point(a)
b: y = y(A)
C = Point(b)
c: x = x(C)
E = Point(c)
d: y = y(E)
F = Point(b)
t = 0.116 (slider from 0 to 1, step 0.0010)
D: C + t * Vector[C, F]
G: (x(D), y(E))
e = Segment(B, G)
f = Segment(G, D)
H = Point(d)
α = Angle(B, G, H)
I = (0.42, 1.98)
J = Point(b)
K = Point(b)
L = (10.9, 1.6600000000000001)
多邊形1, i, j, k, l = Polygon(I, J, K, L)
g = Segment((x(A), y(G)), G)
h = Segment(A, B)
m = Segment(D, C)
n = Segment(A, D)