三角測量(3)
Author: 藍邦偉  老師

由A點測得建築物樓頂B點的仰角為α，前進到P點測得B點的仰角為β，求建築物高。

三角測量(30)

V = (3.3000000000000003, 2.12)
U = (3.3000000000000003, 1.02)
T = (4.16, 0.64)
S = (4.16, -0.16)
R = (4.88, -0.38)
O = (10.86, -0.64)
N = (4.86, -1.32)
B = (-1.42, 6.16)
u = Vector((x(Corner[1.0]), 0.0), (x(Corner[3.0]), 0.0))
v = Vector((0.0, y(Corner[1.0])), (0.0, y(Corner[3.0])))
A_1 = (5.04, -1.9000000000000001)
B_1 = (1.5, -1.74)
L_1: x = x(Corner[2.0])
a = Ray(B_1, A_1)
C_1 = Intersect(L_1, a)
D = Corner(2.0)
E: (x(A_1), y(Corner[2.0]))
多邊形1, a_1, c, d, e = Polygon(A_1, C_1, D, E)
F = (1.34, -1.68)
G = (5.0200000000000005, -1.28)
b = Ray(F, G)
H = Intersect(b, L_1)
多邊形2, g, a_2, c_1, h = Polygon(G, A_1, C_1, H)
I = (3.58, -2.62)
J = (3.3000000000000003, -2.42)
K = (3.84, -2.2600000000000002)
L = (4.46, -2.22)
M = (4.94, -2.22)
f = Conic(I, J, K, L, M)
C = (-1.42, -1.92)
A = (10.200000000000001, -2.38)
i = Segment(A, B)
j = Segment(B, C)
k = Segment(C, A)
P = Point(k)
l = Segment(B, P)
α = Angle(B, A, P)
Q = Corner(3.0)
多邊形3, m, n, p, q, r, s, t, b_1, d_1 = Polygon(O, Q, B, V, U, T, S, R, N)
β = Angle(B, P, C)
Z_1 = Corner(4.0)
W = (-4.26, 4.42)
多邊形4, w, z_1, b_2 = Polygon(Z_1, B, W)
Z = (1, 3.68)
D_1 = (1.02, 1.84)
E_1 = (1.8800000000000001, 1.4000000000000001)
F_1 = (1.8800000000000001, 3)
多邊形5, z, f_1, e_1, d_2 = Polygon(Z, F_1, E_1, D_1)