Question

3. In adjacent figure angle B less than angle A and angle C less than angle D
Show that AD<BC.​

Answer 1

GIVEN
              angle b < angle a
              angle c < angle d
 
TO PROVE
                  
                   AD < BC
PROOF
              angle b < angle a
        SO, 
               OA < OB  ( SIDE OPPOSITE TO SMALLER ANGLE IS SMALL ITS THEOREM GIVEN IN NCERT) LET THE ABOVE ONE BE 1
      
       NOW, 
                  angle c < angle d
          SO, 
               OD <  OC ( SIDE OPPOSITE TO SMALLER ANGLE IS SMALL ITS THEOREM GIVEN IN NCERT)
​  LET THE ABOVE ONE BE 2

NOW, 
             ADDING 1 AND 2
   
      OA + OD < OB + OC
ADDING WE GET,  

       AD < BC
                       HENCE PROVED

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Answer 2

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