分数与小数的几何模型

分数与小数的几何模型
几何画板及绘图内容加载中,请稍等……
2017-05-01 20:50
本范例通过几何图形展示了分数与小数的概念。它涉及分数、坐标、平行四边形和三角形等核心数学概念。通过使用GeoGebra命令如Corner、Point、Polygon等,可以动态地构造这些几何图形。适合小学高年级至初中阶段的学生学习和教师教学。

GeoGebra 命令及参数

  1. Corner(5) → A_1
  2. Point(Sequence[(k, 0), k, 0, 3.6, 0.1]) → A
  3. Point(Sequence[(x(A) + 0.1, j), j, 0, 1, 0.1]) → B
  4. Polygon((1.3, 0), (2.3, 0), (2.3, 1), (1.3, 1)) → poly3, i, j, k, l
  5. Polygon((2.6, 0), (3.6, 0), (3.6, 1), (2.6, 1)) → poly4, m, n, p, q
  6. If((x(A) ≥ 1) ∧ (x(A) < x(Vertex[poly3, 1])) ∨ (x(A) ≥ x(Vertex[poly3, 2])) ∧ (x(A) < x(Vertex[poly4, 1])) ∨ x(A) ≟ x(Vertex[poly4, 2]), true, false) → integer
  7. Polygon(A, A + (0.1, 0), A + (0.1, If[integer, 0, y(B)]), A + (0, If[integer, 0, y(B)])) → poly8, j_1, k_1, l_1, m_1
  8. Polygon((0, 0), (Min[x(A), 1], 0), (Min[x(A), 1], 1), (0, 1)) → poly5, r, s, t, a_1
  9. Polygon((x(Vertex[poly3, 1]), 0), (Max[Min[x(A), x(Vertex[poly3, 1]) + 1], x(Vertex[poly3, 1])], 0), (Max[Min[x(A), x(Vertex[poly3, 1]) + 1], x(Vertex[poly3, 1])], 1), (x(Vertex[poly3, 1]), 1)) → poly6, b_1, c_1, d_1, e_1
  10. Polygon((x(Vertex[poly4, 1]), 0), (Max[Min[x(A), x(Vertex[poly4, 1]) + 1], x(Vertex[poly4, 1])], 0), (Max[Min[x(A), x(Vertex[poly4, 1]) + 1], x(Vertex[poly4, 1])], 1), (x(Vertex[poly4, 1]), 1)) → poly7, f_1, g_1, h_1, i_1
  11. Polygon((0.8187524918794742, 1.1041021645196354), (1.818752491879475, 1.1041021645196354), (1.818752491879475, 2.1041021645196336), (0.8187524918794742, 2.1041021645196336)) → poly1, a, b, c, d
  12. Polygon((0, 0), (1, 0), (1, 1), (0, 1)) → poly2, e, f, g, h
  13. Sequence(Segment[(0, j), (1, j)], j, 0, 1, 0.1) → list4
  14. Sequence(Segment[(x(Vertex[poly3, 1]), j), (x(Vertex[poly3, 1]) + 1, j)], j, 0, 1, 0.1) → list5
  15. Sequence(Segment[(x(Vertex[poly4, 1]), j), (x(Vertex[poly4, 1]) + 1, j)], j, 0, 1, 0.1) → list6
  16. Sequence(Segment[(i, 0), (i, 1)], i, 0, 1, 0.1) → list1
  17. Sequence(Segment[(x(Vertex[poly3, 1]) + i, 0), (x(Vertex[poly3, 1]) + i, 1)], i, 0, 1, 0.1) → list2
  18. Sequence(Segment[(x(Vertex[poly4, 1]) + i, 0), (x(Vertex[poly4, 1]) + i, 1)], i, 0, 1, 0.1) → list3
  19. If(y(B) < 1, (100 * poly8), 0) → hundredthdigit