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Exploring Fraction Multiplication via Geometric Area Models

Exploring Fraction Multiplication via Geometric Area Models
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2017-03-15 20:43
PolygonSequenceCoordinate GeometryGeometric Construction
This GeoGebra example demonstrates fraction multiplication using geometric area models. Key concepts include fraction operations, area calculation, and visual representation of multiplication. Construction utilizes Intersect for point definition, Polygon for shapes, and Sequence for iterative visualization. Ideal for middle school students learning arithmetic or educators seeking interactive geometry tools for fraction instruction.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Point(xAxis) → B
  3. Polygon(A, B, 4) → poly1, f, g, h, j, C, D
  4. Sequence((x(B), y(B) + (i * g / d)), i, 0, d) → pointright
  5. Sequence((x(A), y(A) + (i * j / d)), i, 0, d) → pointleft
  6. Sequence(Segment[Element[pointleft, i], Element[pointright, i]], i, 1, d + 1) → list2
  7. Sequence((x(D) + (i * h / b), y(D)), i, 0, b) → pointtop
  8. Sequence((x(A) + (i * f / b), y(A)), i, 0, b) → pointbottom
  9. Sequence(Segment[Element[pointtop, i], Element[pointbottom, i]], i, 1, b + 1) → list1
  10. Intersect(Element[list1, a + 1], Element[list2, c + 1]) → E
  11. Polygon(A, D, Element[pointtop, a + 1], Element[pointbottom, a + 1]) → poly2, a_1, d_1, i, k
  12. Polygon(A, Element[pointbottom, a + 1], E, Element[pointleft, c + 1]) → poly3, p, q, r, s
  13. Intersect(Element[list1, a + 1], f) → F
  14. Sequence((x(F), y(F) + (i * g / d)), i, 0, d) → list3
  15. Sequence(Segment[Element[pointleft, i], Element[list3, i]], i, 1, d + 1) → list4