三角測量(20)
Author: 藍邦偉  老師

小潔眼睛距地面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A點測得仰角β。

$ 三角測量\;(20) $

$ O $

$ H $

$ B $

$ A $

$ C $

$ D $

$ F $

O = (-2.02, -1.44)
a: x = x(O)
H = Point(a)
b: y = y(O)
C = Point(b)
c: x = x(C)
D = Point(c)
d: y = y(D)
F = Point(b)
t = 0 (slider from 0 to 1, step 0.0010)
A: C + t * Vector[C, F]
B: (x(A), y(D))
e = Segment(H, B)
f = Segment(B, A)
H_1 = Point(d)
α = Angle(H, B, H_1)
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(O), y(B)), B)
h = Segment(O, H)
m = Segment(A, C)
p = Segment(O, A)