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Location: EasyGeom > Tutorials > Advaced Tutorials > Escribed circle for triangle
Escribed circle for triangle
  1. Use menu Paint→Triangle→Triangle paint a triangle
  2. Label A B C for triangle vertexes
  3. Select point B and A
  4. Use menu Assemble→Straight→Ray(Two Point Form) assemble ray BA
  5. Use menu Elements→Current Element→Stroke Type set dot dot style for ray<
  6. Use menu Assemble→Point→Outline Point assemble a point on ray BA
  7. Long touch this point, and move it away from segment BA
  8. Label D for this point
  9. Select point B and C
  10. Use menu Assemble→Straight→Ray(Two Point Form) assemble ray BC
  11. Use menu Elements→Current Element→Stroke Type set dot dot style for ray
  12. Use menu Assemble→Point→Outline Point assemble a point on ray BC
  13. Long touch this point, and move it away from segment BA
  14. Label E for this point
  15. Select point D A C
  16. Use menu Assemble→Straight→Bisector Assemble bisector for ∠DAC
  17. Use menu Elements→Current Element→Stroke Type set dot dot style for bisector
  18. Select point E C A
  19. Use menu Assemble→Straight→Bisector Assemble bisector for ∠ECA
  20. Use menu Elements→Current Element→Stroke Type set dot dot style for bisector
  21. Select bisectors of ∠DAC and ∠ECA
  22. Use menu Assemble→Point→Cross Point assemble cross point for bisectors
  23. Label F for this cross point
  24. Select point F and Ray BE
  25. Use menu Assemble→Point→Projection assemble projection for point F on ray BE
  26. Label G for this projection
  27. Select point F G
  28. Use menu Assemble→Circle→Circle(Center+Point) assemble escribed circle for triangle ABC
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