三角形面积演示 by GreenMaths

GeoGebra 命令及参数

1. Point(Circle[A, Height]) → C
2. Circle(A, C) → e
3. Point(Circle[A, Base]) → B
4. Segment(A, B) → b
5. OrthogonalLine(B, b) → g
6. OrthogonalLine(A, b) → f
7. Intersect(e, f, 1) → D
8. OrthogonalLine(D, f) → h
9. Intersect(g, h) → E
10. Polygon(A, D, E, B) → P, a_1, d_1, e_1, b_1
11. Point(d_1) → S_2
12. OrthogonalLine(S_2, b_1) → a_5
13. Segment(A, C) → d
14. Midpoint(A, D) → F
15. Midpoint(A, B) → G
16. Point(Circle[A, 1]) → H
17. Segment(A, H) → i
18. Point(Circle[A, 2]) → I
19. Segment(A, I) → j
20. Point(Circle[A, 3]) → J
21. Segment(A, J) → k
22. Point(Circle[A, 4]) → K
23. Segment(A, K) → l
24. Point(Circle[A, 5]) → L
25. Segment(A, L) → m
26. Point(Circle[A, 6]) → M
27. Segment(A, M) → n
28. Point(Circle[A, 7]) → N
29. Segment(A, N) → p
30. Point(Circle[A, 8]) → O
31. Segment(A, O) → q
32. Point(Circle[A, 9]) → Q
33. Segment(A, Q) → r
34. Circle(A, H) → s
35. Circle(A, I) → t
36. Circle(A, J) → c_1
37. Circle(A, K) → f_1
38. Circle(A, L) → g_1
39. Circle(A, M) → h_1
40. Circle(A, N) → k_1
41. Circle(A, O) → p_1
42. Circle(A, Q) → q_1
43. Intersect(s, a_1, 1) → R
44. Intersect(t, a_1, 1) → S
45. Intersect(c_1, a_1, 1) → T
46. Intersect(f_1, a_1, 1) → U
47. Intersect(g_1, a_1, 1) → V
48. Intersect(h_1, a_1, 1) → W
49. Intersect(k_1, a_1, 1) → Y
50. Intersect(p_1, a_1, 1) → Z
51. Intersect(q_1, a_1, 1) → A_1
52. Intersect(q_1, b_1, 1) → B_1
53. Intersect(p_1, b_1, 1) → C_1
54. Intersect(k_1, b_1, 1) → D_1
55. Intersect(h_1, b_1, 1) → E_1
56. Intersect(g_1, b_1, 1) → F_1
57. Intersect(f_1, b_1, 1) → G_1
58. Intersect(c_1, b_1, 1) → H_1
59. Intersect(t, b_1) → I_1,
60. Intersect(s, b_1, 1) → J_1
61. OrthogonalLine(R, a_1) → i_1
62. OrthogonalLine(S, a_1) → j_1
63. OrthogonalLine(T, a_1) → l_1
64. OrthogonalLine(U, a_1) → m_1
65. OrthogonalLine(V, a_1) → n_1
66. OrthogonalLine(W, a_1) → r_1
67. OrthogonalLine(Y, a_1) → s_1
68. OrthogonalLine(Z, a_1) → t_1
69. OrthogonalLine(A_1, a_1) → a_2
70. OrthogonalLine(J_1, b_1) → b_2
71. OrthogonalLine(I_1, b_1) → c_2
72. OrthogonalLine(H_1, b_1) → d_2
73. OrthogonalLine(G_1, b_1) → e_2
74. OrthogonalLine(F_1, b_1) → f_2
75. OrthogonalLine(E_1, b_1) → g_2
76. OrthogonalLine(D_1, b_1) → h_2
77. OrthogonalLine(C_1, b_1) → i_2
78. OrthogonalLine(B_1, b_1) → j_2
79. Intersect(b_2, d_1) → K_1
80. Intersect(c_2, d_1) → L_1
81. Intersect(d_2, d_1) → M_1
82. Intersect(e_2, d_1) → N_1
83. Intersect(f_2, d_1) → O_1
84. Intersect(g_2, d_1) → P_1
85. Intersect(h_2, d_1) → Q_1
86. Intersect(i_2, d_1) → R_1
87. Intersect(j_2, d_1) → S_1
88. Intersect(a_2, e_1) → T_1
89. Intersect(t_1, e_1) → U_1
90. Intersect(s_1, e_1) → V_1
91. Intersect(r_1, e_1) → W_1
92. Intersect(n_1, e_1) → Y_1
93. Intersect(m_1, e_1) → Z_1
94. Intersect(l_1, e_1) → A_2
95. Intersect(j_1, e_1) → B_2
96. Intersect(i_1, e_1) → C_2
97. Segment(J_1, K_1) → k_2
98. Segment(I_1, L_1) → l_2
99. Segment(H_1, M_1) → m_2
100. Segment(G_1, N_1) → n_2
101. Segment(F_1, O_1) → p_2
102. Segment(E_1, P_1) → q_2
103. Segment(D_1, Q_1) → r_2
104. Segment(C_1, R_1) → s_2
105. Segment(B_1, S_1) → t_2
106. Segment(R, C_2) → a_3
107. Segment(B_2, S) → b_3
108. Segment(T, A_2) → c_3
109. Segment(Z_1, U) → d_3
110. Segment(V, Y_1) → e_3
111. Segment(W_1, W) → f_3
112. Segment(Y, V_1) → g_3
113. Segment(U_1, Z) → h_3
114. Segment(A_1, T_1) → i_3
115. Intersect(q_1, a_1) → D_2, D_5
116. Intersect(p_1, a_1) → E_2, E_5
117. Intersect(k_1, a_1) → F_2, F_4
118. Intersect(h_1, a_1) → G_2, G_4
119. Intersect(g_1, a_1) → H_2, H_4
120. Intersect(f_1, a_1) → I_2, I_4
121. Intersect(c_1, a_1) → J_2, J_4
122. Intersect(t, a_1) → K_2, K_3
123. Intersect(c_1, b_1) → L_2, L_3
124. Intersect(f_1, b_1) → M_2, M_3
125. Intersect(g_1, b_1) → N_2, N_3
126. Intersect(h_1, b_1) → O_2, O_3
127. Intersect(k_1, b_1) → P_2, P_3
128. Intersect(q_1, b_1) → Q_2, Q_3
129. Intersect(p_1, b_1) → R_2, R_3
130. OrthogonalLine(D_2, a_1) → a
131. OrthogonalLine(E_2, a_1) → c
132. OrthogonalLine(F_2, a_1) → j_3
133. OrthogonalLine(G_2, a_1) → k_3
134. OrthogonalLine(H_2, a_1) → l_3
135. OrthogonalLine(I_2, a_1) → m_3
136. OrthogonalLine(J_2, a_1) → n_3
137. OrthogonalLine(K_2, a_1) → p_3
138. OrthogonalLine(L_2, b_1) → q_3
139. OrthogonalLine(M_2, b_1) → r_3
140. OrthogonalLine(N_2, b_1) → s_3
141. OrthogonalLine(O_2, b_1) → t_3
142. OrthogonalLine(P_2, b_1) → a_4
143. OrthogonalLine(R_2, b_1) → b_4
144. OrthogonalLine(Q_2, b_1) → c_4
145. Intersect(q_3, d_1) → U_2
146. Intersect(r_3, d_1) → V_2
147. Intersect(s_3, d_1) → W_2
148. Intersect(t_3, d_1) → Y_2
149. Intersect(a_4, d_1) → Z_2
150. Intersect(b_4, d_1) → A_3
151. Intersect(c_4, d_1) → B_3
152. Intersect(e_1, a) → C_3
153. Intersect(e_1, c) → D_3
154. Intersect(e_1, j_3) → E_3
155. Intersect(e_1, k_3) → F_3
156. Intersect(e_1, l_3) → G_3
157. Intersect(e_1, m_3) → H_3
158. Intersect(e_1, n_3) → I_3
159. Intersect(p_3, e_1) → J_3
160. Segment(U_2, L_2) → d_4
161. Segment(M_2, V_2) → e_4
162. Segment(W_2, N_2) → f_4
163. Segment(O_2, Y_2) → g_4
164. Segment(Z_2, P_2) → h_4
165. Segment(R_2, A_3) → i_4
166. Segment(B_3, Q_2) → j_4
167. Segment(J_3, K_2) → k_4
168. Segment(J_2, I_3) → l_4
169. Segment(H_3, I_2) → m_4
170. Segment(H_2, G_3) → n_4
171. Segment(F_3, G_2) → p_4
172. Segment(F_2, E_3) → q_4
173. Segment(D_3, E_2) → r_4
174. Segment(D_2, C_3) → s_4
175. Intersect(a_1, b_1) → T_2
176. Intersect(e_1, b_1) → S_3
177. Intersect(b_1, a_5) → T_3
178. Polygon(T_2, S_2, T_3) → poly1, t_4, t_5, s_5
179. Polygon(S_2, S_3, T_3) → poly2, t_6, s_6, s_7
180. Midpoint(t_6) → V_3
181. Midpoint(t_4) → W_3
182. Rotate(S_2, α, V_3) → Z_3
183. Rotate(S_3, α, V_3) → A_4
184. Rotate(T_3, α, V_3) → B_4
185. Polygon(Z_3, A_4, B_4) → poly2', b_5, z_3, a_6
186. Rotate(T_2, -α, W_3) → C_4
187. Rotate(S_2, -α, W_3) → D_4
188. Rotate(T_3, -α, W_3) → E_4
189. Polygon(C_4, D_4, E_4) → poly1', e_5, c_5, d_5