CEB=EBC
BCA=γ
ECB=180-γ
EBC=(180-ECB)/2=γ/2
аналогичноBDA=α/2
EBD=180-(α+β)/2
BCA=a
ECB=180-a
EBC=(180-ECB)/2=a/2
BDA=α/2
EBD=180-(b+c)/2
CEB=EBC
BCA=γ
ECB=180-γ
EBC=(180-ECB)/2=γ/2
аналогичноBDA=α/2
EBD=180-(α+β)/2
CEB=EBC
BCA=a
ECB=180-a
EBC=(180-ECB)/2=a/2
BDA=α/2
EBD=180-(b+c)/2