Plzzzzzzzzzzzzz tell example no. 8 Plzzzzzzzzzzzzz
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CBO=1/2 CBE= (180-y)/2=90-y/2
similarly BCO=(180-z)/2=90-z/2
now CBE+BCO+BOC=180
SO 90-y/2+90-z/2 +BOC=180
or 180-(y+z)/2+BOC=180
or BOC=(y+z)/2
NOW, x+y+z=180
so y+z=180-x
or (y+z)/2=(180-x)/2
hence BOC=(180-x)/2
=90-x/2
=90-1/2 ang BAC
similarly BCO=(180-z)/2=90-z/2
now CBE+BCO+BOC=180
SO 90-y/2+90-z/2 +BOC=180
or 180-(y+z)/2+BOC=180
or BOC=(y+z)/2
NOW, x+y+z=180
so y+z=180-x
or (y+z)/2=(180-x)/2
hence BOC=(180-x)/2
=90-x/2
=90-1/2 ang BAC
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