In the given figure prove that :x=a+b+c .

Dear Student ,
 
Please find below the solution to the asked query :



In ABDA+B+D=180°   Angle Sum Propertyb+c+OBD+a+ODB=180°OBD+ODB=180°-a-b-cNow,In OBDOBD+ODB+BOD=180°   Angle Sum Property180°-a-b-c+x=180°x=180°-180°+a+b+cx=a+b+cHence Proved.
 
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