MathPlotAI Logo MathPlotAI

Comparing Fractions with Lines and Circles by Duane Habecker

Comparing Fractions with Lines and Circles by Duane Habecker
Loading the math board and drawing, please wait…
2017-10-30 14:19
CircleGeometric Construction
This example uses lines and circles to compare fractions. It demonstrates the basic concepts of fractions, including numerators and denominators. Using GeoGebra commands such as Line, Point, Circle, Intersect, etc., it constructs intuitive graphics to help understand the size relationship of fractions. Suitable for high-grade elementary and junior high school students.

GeoGebra Commands & Parameters

  1. Line(A, yAxis) → f
  2. Point(f) → B
  3. Point(f) → C
  4. Circle(B, linelength) → c
  5. Circle(C, linelength) → d
  6. OrthogonalLine(B, f) → g
  7. OrthogonalLine(C, f) → h
  8. Intersect(c, g, 1) → D
  9. Intersect(d, h, 1) → E
  10. Segment(B, D) → i
  11. Segment(C, E) → j
  12. Sequence(B + ((i * linelength / frac1denom), 0), i, 1, frac1denom) → frac1intervals
  13. Sequence(C + ((i * linelength / frac2denom), 0), i, 1, frac2denom) → frac2intervals
  14. Segment(B, B + ((frac1num * linelength / frac1denom), 0)) → frac1segment
  15. Segment(C, C + ((frac2num * linelength / frac2denom), 0)) → frac2segment
  16. Segment(F, G) → k
  17. Line(H, f) → l
  18. Point(l) → I
  19. Point(l) → J
  20. Circle(I, circlesize) → e
  21. Circle(J, circlesize) → p
  22. Intersect(e, l, 2) → K
  23. Intersect(p, l, 2) → L
  24. Segment(I, K) → m
  25. Segment(J, L) → n
  26. Sequence(Segment[Rotate[I, (i * angle1rotation), I], Rotate[K, (i * angle1rotation), I]], i, 1, frac1denom) → frac1wedges
  27. Sequence(Segment[Rotate[J, (i * angle2rotation), J], Rotate[L, (i * angle2rotation), J]], i, 1, frac2denom) → frac2wedges
  28. CircleSector(I, K, Rotate[K, (frac1num * angle1rotation), I]) → frac1Sector
  29. CircleSector(J, L, Rotate[L, (frac2num * angle2rotation), J]) → frac2Sector