Circumcenter of a Triangle by Tim Brzezinski

Circumcenter of a Triangle by Tim Brzezinski
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2015-08-09 12:33
This example demonstrates the circumcenter of a triangle by drawing perpendicular bisectors to help students discover its properties. Key mathematical concepts include perpendicular bisectors and circumcenter. GeoGebra commands used include Segment, LineBisector, and Polygon. Suitable for middle school and above students learning geometric construction.

GeoGebra Commands & Parameters

  1. Segment(J, L) → a
  2. Segment(L, K) → b
  3. Segment(K, J) → c
  4. LineBisector(a) → g
  5. LineBisector(c) → h
  6. LineBisector(b) → i
  7. Angle(a, g) → α
  8. Angle(b, i) → β
  9. Angle(c, h) → γ
  10. Intersect(g, a) → D
  11. Intersect(i, b) → E
  12. Intersect(h, c) → F
  13. Segment(J, D) → d
  14. Segment(D, L) → e
  15. Segment(L, E) → f
  16. Segment(E, K) → j
  17. Segment(K, F) → k
  18. Segment(F, J) → l
  19. Intersect(g, h) → C
  20. Angle(D, J, F) → δ
  21. Angle(F, K, E) → ε
  22. Angle(E, L, D) → ζ
  23. Polygon(J, K, L) → poly1, l_1, j_1, k_1