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Number Line by Tom Carpenter

Number Line by Tom Carpenter
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2017-05-09 23:20
Coordinate GeometryGeometric Construction
In collections Concrete-Pictorial-Abstract and the Teaching for Mastery
This example demonstrates the creation and manipulation of a number line. It involves core mathematical concepts such as number lines, coordinate representation, and geometric constructions. GeoGebra commands/objects used include Intersect (intersection), Point (point), Segment (segment), Textfield (text field), Midpoint (midpoint), and Sequence (sequence). Suitable for middle school and above mathematics education to understand number lines and coordinate systems.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Point(xAxis) → B
  3. Segment(A, B) → f
  4. Textfield(A1) → InputBox1
  5. Textfield(A2) → InputBox2
  6. Segment((0, -0.3), (10, -0.3)) → g
  7. Point(g) → L
  8. Point(g) → M
  9. Segment(N, O) → h
  10. Midpoint(h) → Q
  11. Sequence(Semicircle[(i + 1, -0.7), (i, -0.7)], i, x(L), x(M) - 1, 1) → list3
  12. Sequence((i, -0.7), i, x(L + 1), x(M), 1) → list1
  13. Sequence((i, -0.7), i, x(L + 2), x(M), 2) → list4
  14. Sequence(Semicircle[(i + 2, -0.7), (i, -0.7)], i, x(L), x(M - 1) - 1, 2) → list2
  15. Sequence(Semicircle[(i, -0.7), (i - 1, -0.7)], i, x(L), x(M) + 1, -1) → list5
  16. Sequence((i, -0.7), i, x(L - 1), x(M), -1) → list6
  17. Sequence(Semicircle[(i, -0.7), (i - 2, -0.7)], i, x(L), x(M) + 2, -2) → list8
  18. Sequence((i, -0.7), i, x(L) - 2, x(M), -2) → list7