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Area of a Trapezium by toby mcfarlane

Area of a Trapezium by toby mcfarlane
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2015-10-09 15:01
PolygonCoordinate GeometryGeometric Construction
This example demonstrates how to calculate the area of a trapezium by changing its dimensions. Key mathematical concepts include area calculation in geometry and polygons. GeoGebra commands used include Line, Point, Segment, Polygon, Rotate, Angle, and Intersect. Suitable for middle school and above students to learn geometric construction and area calculation.

GeoGebra Commands & Parameters

  1. Line(A, B) → a
  2. Point(a) → C
  3. Point(a) → D
  4. Line(E, a) → b
  5. Point(b) → F
  6. Segment(E, F) → c
  7. Segment(F, D) → d
  8. Segment(D, C) → e
  9. Segment(C, E) → f
  10. Polygon(E, F, D, C) → poly1, e_1, f_1, d_1, c_1
  11. Point(c) → G
  12. Point(e) → H
  13. Point(c) → I
  14. Point(e) → J
  15. Rotate(D, 90*°, J) → D'
  16. Angle(D, J, D') → α
  17. Line(J, D') → g
  18. Intersect(g, c) → K
  19. Segment(K, J) → h