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Ch.5 Concept Map (5.1 Angle of a triangle (Alternate angles (example If…

- - - - example In triangle ABC a+b+c=180' ( < sum of triangle)
  - - - example In angle ABC c=a+b (ext.<of triangle)
- - - - In triangle ABC If AB=AC then<B=<C (base angles isos triangles)
    - - 1.BD=CD 2. <BAD=<CAD 3.AD=BC (prop of isos angle)
    - - In triangle ABC if <B=<C then AB=AC (sides opp equal angles)
  - - - In triangle ABC if AB=BC=AC then <a=<B=<C=60' (prop of equal triangle)