Calculate the Area of the Composite Shape

Calculate the Area of the Composite Shape
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2018-03-29 22:41
This example demonstrates how to calculate the area of a composite shape made up of multiple geometric figures. Key mathematical concepts include geometric construction, area calculation, and similar triangles. Using GeoGebra commands such as Point, Polygon, and Intersect, complex geometric shapes can be constructed. Suitable for middle school and above students or teachers.

GeoGebra Commands & Parameters

  1. Point(yAxis) → Z_1
  2. Point(yAxis) → W_1
  3. Polygon(W_1, Z_1, A_2, B_2, C_2, D_2, E_2, F_2) → poly7, w_1, z_2, a_2, b_2, c_2, d_2, e_2, f_2
  4. Point(yAxis) → Q_1
  5. Polygon(Q_1, R_1, S_1, T_1, U_1, V_1) → poly6, q_1, r_1, s_1, t_1, u_1, v_1
  6. Point(yAxis) → H_1
  7. Point(yAxis) → G_1
  8. Polygon(G_1, H_1, I_1, J_1, K_1, L_1, O_1, P_1) → poly5, g_1, h_1, i_1, j_1, k_1, l_1, m_1, n_1
  9. Point(xAxis) → D_1
  10. Polygon(V, W, Z, A_1, B_1, C_1, D_1, E_1, F_1) → poly4, v, w, z_1, a_1, b_1, c_1, d_1, e_1, f_1
  11. Intersect(xAxis, yAxis) → S
  12. Point(yAxis) → N
  13. Polygon(N, O, P, Q, R, S, T, U) → poly3, n, o, p, q, r, s, t, u
  14. Point(yAxis) → H
  15. Polygon(H, I, J, K, L, M) → poly2, h, i, j, k, l, m
  16. Point(yAxis) → B
  17. Point(yAxis) → A
  18. Polygon(A, B, C, D, E, F, G) → poly1, a, b, c, d, e, f, g
  19. LaTeX("Calculate\ the\ area\ of\ the\ composite\ shape\ by\ decomposing\ the\ shape\ into\ rectangles,\\ parallelograms,\, trapezoids,\, and\ triangles.") → Instructions1
  20. LaTeX("\textbf{Instructions\text{:}}\ Use\ the\ grid\ to\ find\ the\ lengths\ of\ the\ sides.\, Enter\ the\ area\ in\ the\ input\ box.") → Instructions2
  21. Textfield(StudentAns) → InputBox1
  22. LaTeX("Area=") → AreaLabel
  23. If(ShapeIndex ≟ 1, Area[poly1], If[ShapeIndex ≟ 2, Area[poly2], If[ShapeIndex ≟ 3, Area[poly3], If[ShapeIndex ≟ 4, Area[poly4], If[ShapeIndex ≟ 5, Area[poly5], If[ShapeIndex ≟ 6, Area[poly6], Area[poly7]]]]]]) → ShapeArea
  24. LaTeX("\checkmark") → RightCheck
  25. LaTeX("\times") → WrongCheck
  26. If(StudentAnsNum < ShapeArea, LaTeX["small"], LaTeX["large"]) → problem
  27. LaTeX("Please\ type\ a\ number\ into\\ the\ input\ box\ before\\ checking\ your\ answer.") → NotStartedFB
  28. Intersect(t, u) → G_2
  29. Intersect(o, p) → H_2
  30. Segment(G_2, H_2) → S3L1
  31. Intersect(s, t) → I_2
  32. Segment(I_2, J_2) → S3L2
  33. Intersect(m_1, n_1) → K_2
  34. Point(h_1) → L_2
  35. Segment(K_2, L_2) → S5L2
  36. Intersect(k_1, l_1) → M_2
  37. Point(h_1) → N_2
  38. Segment(M_2, N_2) → S5L1
  39. Point(e_2) → O_2
  40. Intersect(b_2, c_2) → P_2
  41. Segment(O_2, P_2) → S7L1
  42. Segment(K_2, L_2) → S7L2
  43. Intersect(h, i) → Q_2
  44. Intersect(k, l) → R_2
  45. Segment(Q_2, R_2) → S2L1
  46. Intersect(a_1, b_1) → S_2
  47. Segment(P_2, S_2) → S4L1
  48. Intersect(d_1, e_1) → T_2
  49. Segment(T_2, R_2) → S4L2
  50. Intersect(u_1, v_1) → U_2
  51. Segment(Q_2, U_2) → S6L1
  52. Point(a) → V_2
  53. Segment(V_2, R_2) → S1L2
  54. Intersect(d, e) → W_2
  55. Segment(W_2, Z_2) → S1L1
  56. LaTeX("That\ is\ not\ correct.\\Please\ try\ again.") → KeepGoingFB
  57. LaTeX("One\ possible\ decomposition\ has\\ been\ shown.\, Find\ the\ area\ of\ each \\ of\ the\ simple\ shapes\ and\ add\\ them\ together\ to\ find\ the\ area\ of\\ the\ composite\ shape.") → AnswerShownFB
  58. Polygon((-2, 5.5), (20, 5.5), (20, 100), (-2, 100)) → White1, p_1, g_2, h_2, i_2
  59. Polygon((7.5, 6), (20, 6), (20, -100), (7.5, -100)) → White2, j_2, k_2, l_2, m_2
  60. LaTeX("units^2") → Units

AI Drawing Prompt Reference

Draw a composite shape consisting of a hexagon, pentagon, heptagon, quadrilateral, triangle, and parallelogram. Start by creating points on the y-axis, then draw polygons sequentially, and finally use intersections and segments to connect the vertices of these polygons, forming a complex geometric shape.
The prompt above was compiled from the original drawing commands and is for reference only.