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矩形面积 by zeyu wang

矩形面积 by zeyu wang
几何画板及绘图内容加载中，请稍等……
2017-09-24 20:25
多边形解析几何几何作图
这个范例演示了如何通过改变矩形的长和宽来计算矩形的面积。核心数学概念包括矩形的面积公式。使用了Sequence, Polygon, Circle等GeoGebra命令进行构造。适合初中及以上学生学习几何作图。

GeoGebra 命令及参数

  1. Sequence((x(A) + (unitsize * i), y(A)), i, 1, base) → list1
  2. Sequence((x(A) + (unitsize * i), y(A) + (height * unitsize)), i, 1, base) → list2
  3. Sequence((x(A), y(A) + (unitsize * i)), i, 1, height) → list3
  4. Sequence((x(A) + base, y(A) + (unitsize * i)), i, 1, height) → list4
  5. Polygon(A, Element[list1, base], Element[list2, base], Element[list3, height]) → poly1, a, b, c, d
  6. Circle(B, unitsize) → f
  7. Point(f) → C
  8. Circle(C, unitsize) → g
  9. Polygon(B, C, 4) → poly2, h, i, j, k, D, E
  10. Sequence(Segment[(x(A), y(A) + (unitsize * i)), (x(A) + (base * unitsize), y(A) + (unitsize * i))], i, 0, height) → dottedhorizontals
  11. Sequence(Segment[(x(A) + (unitsize * i), y(A)), (x(A) + (unitsize * i), y(A) + (height * unitsize))], i, 0, base) → dottedverticals