A CYCLOLOGIC THEOREM RELATED TO EXCENTRAL TRIANGLE.

[APH] Excentral version Let ABC be a triangle, IaIbIc the excentral triangle and P a point.. Denote Pa, Pb, Pc = same to P points of ...

  • EUCLID 4404
  • HOMOTHETIC TRIANGLES and EULER LINES
    Theorem 1. Let ABC be an equilateral triangle and P a point. The Euler lines of the triangles PBC,PCA,PAB are concurent.Denote the point ...
  • ETC
    X(5459) Let ABC be a triangle, let A', B', C' be the midpoints of BC, CA, AB. Let L_a be the perpendicular through A' ...