Simple 3D Problems 1

Simple 3D Problems 1
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2014-08-12 07:18
This example demonstrates the geometric construction and property analysis of a pyramid in three-dimensional space. It involves core mathematical concepts such as trigonometry, angle calculations, optimization problems, centroid or barycenter, and solid geometry. The construction highlights the use of GeoGebra commands and objects like Circle, Point, Segment, Line, Angle, Polygon, PointIn, Intersect, OrthogonalLine, Vector, Translate, and Midpoint. Suitable for high school and above students learning applications of solid geometry, vectors, and optimization problems.

GeoGebra Commands & Parameters

  1. Circle(O, Radius) → axiscircle
  2. Point(axiscircle) → Y
  3. Segment(O, Y) → OX
  4. Point(axiscircle) → Z
  5. Segment(O, Z) → OZ
  6. Line(A, OZ) → yaxis
  7. Point(yaxis) → edgeYPt
  8. Segment(A, edgeYPt) → edgeY
  9. Point(axiscircle) → X
  10. Angle(X, O, Z) → α
  11. Segment(O, X) → OY
  12. Line(A, OY) → CParallelCB
  13. Point(CParallelCB) → edgeXPt
  14. Polygon(edgeYPt, A, edgeXPt) → MaxBase, MaxBaseEdge2, MaxBaseEdge1, MaxBaseEdge3
  15. PointIn(MaxBase) → C
  16. Line(A, C) → MaxBaseDivider
  17. Intersect(MaxBaseEdge3, MaxBaseDivider) → MaxBaseDividerPt
  18. Polygon(MaxBaseDividerPt, A, edgeXPt) → MaxBaseLowerHalf, MaxBaseLowerHalfEdge2, MaxBaseLowerHalfEdge1, MaxBaseLowerHalfEdge3
  19. PointIn(MaxBaseLowerHalf) → B
  20. Polygon(A, B, C) → Base, AB, BC, AC
  21. PointIn(Base) → K
  22. Line(K, OX) → VerticalFromBase
  23. Point(VerticalFromBase) → VerticalFromBasePt
  24. Segment(K, VerticalFromBasePt) → MaxHeight
  25. Point(MaxHeight) → D
  26. Line(K, OZ) → KParallelZ
  27. Line(K, OY) → KParallelX
  28. Intersect(KParallelX, edgeY) → K_Z
  29. Line(C, OY) → CParallelX
  30. Intersect(CParallelX, edgeY) → C_Z
  31. Line(C, OZ) → CParallelZ
  32. Segment(A, edgeXPt) → edgeX
  33. Intersect(KParallelZ, edgeX) → K_X
  34. Circle(A_P, LengthDA / Scale) → CircleAtA_P
  35. Intersect(CParallelZ, edgeX) → C_X
  36. Circle(C_P, LengthDC / Scale) → CircleAtC_P
  37. Line(B, OY) → BParallelX
  38. Line(B, OZ) → BParallelZ
  39. Intersect(BParallelZ, edgeX) → B_X
  40. Intersect(BParallelX, edgeY) → B_Z
  41. Circle(C_Q, LengthDC / Scale) → CircleAtC_Q
  42. Circle(B_Q, LengthDB / Scale) → CircleAtB_Q
  43. OrthogonalLine(K, AC) → KPerpendicularAC
  44. Intersect(KPerpendicularAC, AC) → KonAC
  45. Point(AB) → M
  46. Line(M, OY) → MParallelX
  47. Line(M, OZ) → MParallelZ
  48. Intersect(MParallelZ, edgeX) → M_X
  49. Intersect(MParallelX, edgeY) → M_Z
  50. Point(OX) → RightAngleDistance
  51. Vector(O, RightAngleDistance) → u
  52. Translate(K, u) → DKA3
  53. Line(A, OX) → zaxis
  54. Point(zaxis) → edgeZPt
  55. Segment(A, edgeZPt) → edgeZ
  56. Segment(K, D) → KD
  57. Segment(A, D) → DA
  58. Segment(D, C) → DC
  59. Segment(D, B) → DB
  60. Segment(B_Q, C_Q) → BC_Q
  61. Intersect(CircleAtB_Q, CircleAtC_Q) → D_Q, D_{Q'}, ,
  62. Segment(C_Q, D_Q) → DC_Q
  63. Segment(D_Q, B_Q) → DB_Q
  64. Segment(D_S, M_S) → DM_S
  65. Segment(D_S, K_S) → DK_S
  66. Segment(C_R, A_R) → AC_R
  67. Segment(A_R, B_R) → AB_R
  68. Segment(B_R, C_R) → BC_R
  69. Segment(K_R, A_R) → KA_R
  70. Segment(K_R, B_R) → KB_R
  71. Segment(K_R, C_R) → KC_R
  72. Segment(K, M) → MK
  73. Segment(D, M) → DM
  74. Segment(K_R, M_R) → KM_R
  75. Circle(K, KVertical) → CircleAtK
  76. Intersect(CircleAtK, MK) → KHorizontal1,
  77. Line(KHorizontal1, KD) → KPerpendicularMK
  78. Line(KVertical, MK) → KParallelMK
  79. Intersect(KParallelMK, KPerpendicularMK) → KAngle1
  80. Segment(KHorizontal1, KAngle1) → KAngleVertical1
  81. Segment(KAngle1, KVertical) → KAngleHorizontal1
  82. Line(KVertical, AC) → KParallelAC
  83. Intersect(CircleAtK, AC) → KHorizontal2, KHorizontal3
  84. Line(KHorizontal3, KD) → KParallelDK2
  85. Line(KHorizontal2, KD) → KParallelDK1
  86. Intersect(KParallelDK2, KParallelAC) → KAngle3
  87. Intersect(KParallelDK1, KParallelAC) → KAngle2
  88. Segment(KHorizontal3, KAngle3) → KAngleVertical3
  89. Segment(KAngle3, KVertical) → KAngleHorizontal3
  90. Segment(KVertical, KAngle2) → KAngleHorizontal2
  91. Segment(KAngle2, KHorizontal2) → KAngleVertical2
  92. Intersect(CircleAtK, BC) → KHorizontal4, KHorizontal5
  93. Line(KHorizontal4, KD) → KParallelDK3
  94. Line(KHorizontal5, KD) → KParallelDK4
  95. Line(KVertical, BC) → KParallelBC
  96. Intersect(KParallelDK3, KParallelBC) → KAngle4
  97. Intersect(KParallelDK4, KParallelBC) → KAngle5
  98. Segment(KVertical, KAngle4) → KAngleHorizontal4
  99. Segment(KHorizontal4, KAngle4) → KAngleVertical4
  100. Segment(KVertical, KAngle5) → KAngleHorizontal5
  101. Segment(KAngle5, KHorizontal5) → KAngleVertical5
  102. Segment(A_{R2}, A_{R3}) → A_RAngleHorizontal
  103. Segment(A_{R1}, A_{R3}) → A_RAngleVertical
  104. Segment(B_{R3}, B_{R2}) → B_RAngleHorizontal
  105. Segment(B_{R1}, B_{R2}) → B_RAngleVertical
  106. Circle(B, BAnglePoint1) → CircleAtB
  107. Intersect(CircleAtB, BC) → BAnglePoint2,
  108. Line(BAnglePoint2, edgeX) → BParallelX1
  109. Line(BAnglePoint1, BC) → BParallelZ1
  110. Intersect(BParallelZ1, BParallelX1) → BAnglePoint3
  111. Segment(BAnglePoint1, BAnglePoint3) → BAngleLine1
  112. Segment(BAnglePoint3, BAnglePoint2) → BAngleLine2
  113. Circle(C, 0.5) → CircleAtC
  114. Intersect(CircleAtC, AC) → CAnglePoint2,
  115. Line(CAnglePoint2, BC) → CParallelBC
  116. Circle(C_R, 0.5) → CircleAtC_T
  117. Intersect(CircleAtC_T, AC_R) → C_{R1},
  118. Intersect(CircleAtC_T, BC_R, 1) → C_{R2}
  119. Line(C_{R1}, BC_R) → C_TParallelBC
  120. Line(C_{R2}, AC_R) → C_TParallelAC
  121. Intersect(C_TParallelBC, C_TParallelAC) → C_{R3}
  122. Segment(C_{R3}, C_{R1}) → C_RAngle1
  123. Segment(C_{R3}, C_{R2}) → C_RAngle2
  124. Intersect(CircleAtC, BC) → CAnglePoint1,
  125. Line(CAnglePoint1, AC) → CParallelAC
  126. Intersect(CParallelAC, CParallelBC) → CAnglePoint3
  127. Segment(CAnglePoint2, CAnglePoint3) → CAngleLine1
  128. Segment(CAnglePoint3, CAnglePoint1) → CAngleLine2
  129. Circle(A, 0.5) → CircleAtA
  130. Intersect(CircleAtA, AC) → AAnglePoint1,
  131. Intersect(CircleAtA, AB) → AAnglePoint2,
  132. Line(AAnglePoint1, AB) → AParallelAB
  133. Line(AAnglePoint2, AC) → AParallelAC
  134. Intersect(AParallelAC, AParallelAB) → AAnglePoint3
  135. Segment(AAnglePoint2, AAnglePoint3) → AAngleLine1
  136. Segment(AAnglePoint3, AAnglePoint1) → AAngleLine2
  137. Circle(M_R, 0.5) → CircleAtM_T
  138. Intersect(CircleAtM_T, AB_R) → M_RAnglePoint1, M_RAnglePoint2
  139. Intersect(CircleAtM_T, KM_R) → M_RAnglePoint3,
  140. Line(M_RAnglePoint1, KM_R) → M_TParallelMK2
  141. Line(M_RAnglePoint3, AB_R) → M_TParallelAB
  142. Line(M_RAnglePoint2, KM_R) → M_TParallelMK1
  143. Intersect(M_TParallelMK2, M_TParallelAB) → M_RAnglePoint4
  144. Intersect(M_TParallelMK1, M_TParallelAB) → M_RAnglePoint5
  145. Segment(M_RAnglePoint2, M_RAnglePoint5) → M_RAngleLine1
  146. Segment(M_RAnglePoint5, M_RAnglePoint3) → M_RAngleLine2
  147. Segment(M_RAnglePoint1, M_RAnglePoint4) → M_RAngleLine3
  148. Segment(M_RAnglePoint4, M_RAnglePoint3) → M_RAngleLine4
  149. Intersect(CircleAtC_P, CircleAtA_P) → D_P, D_{P'}, ,
  150. Segment(D_P, A_P) → DA_P
  151. Segment(D_P, C_P) → DC_P
  152. Segment(A_P, C_P) → AC_P
  153. Midpoint(A, C) → MidPointAC
  154. Midpoint(A_R, C_R) → MidPointAC_R
  155. Midpoint(A, B) → MidPointAB
  156. Midpoint(A_R, B_R) → MidPointAB_R
  157. Midpoint(B, C) → MidPointBC
  158. Midpoint(B_R, C_R) → MidPointBC_R
  159. Midpoint(D_Q, C_Q) → MidPointDC_Q
  160. Midpoint(D, C) → MidPointDC
  161. Midpoint(D, B) → MidPointDB
  162. Segment(M_S, K_S) → MK_S
  163. Midpoint(B_Q, C_Q) → MidPointBC_Q
  164. Midpoint(B_Q, D_Q) → MidPointDB_Q
  165. Midpoint(M, K) → MidPointMK
  166. Midpoint(D, K) → MidPointDK
  167. Midpoint(M, D) → MidPointDM
  168. Midpoint(M_S, K_S) → MidPointMK_S
  169. Midpoint(D_S, M_S) → MidPointDM_S
  170. Midpoint(D_S, K_S) → MidPointDK_S
  171. Midpoint(A, D) → MidPointDA
  172. Midpoint(A_P, C_P) → MidPointAC_P
  173. Midpoint(D_P, A_P) → MidPointAD_P
  174. Midpoint(D_P, C_P) → MidPointCD_P
  175. Angle(D_S, K_S, M_S) → DKM_S
  176. Angle(D_P, A_P, C_P) → DAC_P
  177. Angle(A_P, C_P, D_P) → DCA_P
  178. Angle(D_Q, C_Q, B_Q) → DCB_Q
  179. Angle(C_Q, B_Q, D_Q) → DBC_Q

AI Drawing Prompt Reference

Draw a pyramid in 3D space by first creating a circle and marking points on it. Connect the center to these points to form edges, and calculate angles. Then, connect different points to create the base of the pyramid and find its centroid. Next, draw perpendicular lines from the centroid to one side of the base to determine the height of the pyramid. Finally, draw circles at the vertices of the pyramid and connect corresponding points to form the sides, completing the pyramid.
The prompt above was compiled from the original drawing commands and is for reference only.