6) Thrikona Angasamya : O/L Maths ත්‍රිකෝණ අංගසාම්‍ය | Grade 10 and Grade 11 Hiroshi | exercises 

4) Thrikona Angasamya : O/L Maths Sinhala ත්‍රිකෝණ අංගසාම්‍ය | Grade 10 and Grade 11 Hiroshi | ASA
Thrikona Angasamya : O/L Maths Sinhala ත්‍රිකෝණ අංගසාම්‍ය | Grade 10 and Grade 11 Hiroshi maths
Videos in Playlist
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1) Thrikona Angasamya (Introduction of Congruence of Triangles)
• 1) Thrikona Angasamya ...
2) Thrikona Angasamya (SSS Case of Congruent Triangles) පා . පා . පා . අවස්ථා ව (Pa. Pa. Ppa awasthawa)
• 2) Thrikona Angasamya ...
3) Thrikona Angasamya (SAS Case of Congruent Triangles) පා . කෝ . පා . අවස්ථා ව (Pa. Ko. Pa awasthawa)
• 3) Thrikona Angasamya ...
4) Thrikona Angasamya (AAS Case of Congruent Triangles) කෝ . කෝ . පා . අවස්ථා ව (Ko. Ko. Pa awasthawa)
• 4) Thrikona Angasamya ...
5) Thrikona Angasamya (RHS (right-angle-hypotenuse-side) case of Congruent Triangles) කර්ණ. පා . අවස්ථා ව (Karnapa. Pa awasthawa)
• 5) Thrikona Angasamya ...
6) Thrikona Angasamya (මිශ්‍ර අභ්‍යාස )
• 6) Thrikona Angasamya ...