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Area of a Polygon

Area of a Polygon
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2020-04-18 22:08
PolygonCoordinate GeometryGeometric Construction
This example demonstrates how to calculate the area of a polygon using GeoGebra. Key mathematical concepts include the properties of polygons and area formulas. Using commands like Random, Line, Point, and Polygon, a polygon is constructed and its area is calculated. Suitable for middle school and above students to learn how to calculate the area of polygons.

GeoGebra Commands & Parameters

  1. Random(-5, 5) → xA
  2. Random(1, 4) → a
  3. Random(-5, 5) → yC
  4. Random(-5, 5) → xC
  5. Random(-5, 5) → yB
  6. Random(-5, 5) → xB
  7. Random(-5, 5) → yA
  8. Line(A, C) → f
  9. Point(f) → E
  10. OrthogonalLine(B, f) → g
  11. Intersect(f, g) → G
  12. Vector(G, B) → u
  13. Point(E, Vector[(a * (-u))]) → F
  14. Polygon(A, B, C, D) → q1, h, i, j, k
  15. Centroid(q1) → H
  16. Textfield(ans) → InputBox1