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In Fig.71, if A B C D , then the values...

In Fig.71, if `A B C D ,` then the values of `x ,\ y\ a n d\ z` are `x=56 ,\ y=47 ,\ z=77` (b) `x=47 ,\ y=56 ,\ z=77` `x=77 ,\ y=56 ,\ z=47` (d) `x=56 ,\ y=77 ,\ z=47`

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