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2015-02-05T22:10:14+05:30

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as we know that diagonal of a square bisects 
therefore , BO = OC = 3cm
 now in triangle OBC = BO = 3cm
                                  OC = 3cm
     BC^2 = OC^2 + BO^2 
              = 3^2  +  3^2   cm^2
              = 9 + 9 cm^2
              = 18cm^2
    



            
   
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2015-02-07T08:47:48+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
BO = OC = 3cm
 now in triangle OBC = BO = 3cm
                                  OC = 3cm
     BC^2 = OC^2 + BO^2 
              = 3^2  +  3^2   cm^2
              = 9 + 9 cm^2
              = 18cm^2

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