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Breaking Apart Multiplication with Arrays

Breaking Apart Multiplication with Arrays
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2015-01-14 10:24
FunctionTransformationGeometric Construction
This example demonstrates the decomposition of multiplication using arrays. It involves the core mathematical concept of multiplication. Using GeoGebra commands such as Intersect, Point, Segment, etc., an array model is constructed. Suitable for high-grade elementary or junior high school students to learn multiplication decomposition.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Point(xAxis) → B
  3. Segment(A, B) → a
  4. Point(yAxis) → C
  5. Segment(A, C) → b
  6. Point(b) → D
  7. Segment(A, D) → c
  8. Line(D, a) → d
  9. Line(B, c) → e
  10. Intersect(d, e) → E
  11. Segment(D, E) → f
  12. Segment(E, B) → g
  13. Point(a) → F
  14. Line(F, c) → h
  15. Ray(A, B) → i
  16. Point(i) → G
  17. Segment(B, G) → j
  18. Line(G, g) → k
  19. Intersect(d, h) → H
  20. Polygon(H, F, B, E) → poly1, h_1, f_1, b_1, e_1
  21. Point(j) → I
  22. Line(I, g) → l
  23. Intersect(d, l) → J
  24. Polygon(B, I, J, E) → poly2, b_2, i_1, j_1, e_2
  25. Intersect(d, k) → K
  26. Polygon(I, G, K, J) → poly3, i_2, g_1, k_1, j_2
  27. Polygon(A, F, H, D) → poly4, a_1, f_2, h_2, d_1
  28. Segment(D, A) → m
  29. Segment(G, A) → n
  30. Segment(G, K) → p
  31. Segment(K, D) → q
  32. Segment(H, F) → r
  33. Segment(E, B) → s
  34. Segment(J, I) → t
  35. Distance(A, D) → distanceAD
  36. Distance(D, H) → distanceDH
  37. Distance(H, E) → distanceHE
  38. Distance(E, J) → distanceEJ
  39. Distance(J, K) → distanceJK