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  2. In a parallelogram abcd , bc=cd and angle a is 90 than show it is a square.
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In a parallelogram abcd , bc=cd and angle a is 90 than show it is a square.

Answers (1)
R Ravindra Pindel

Given:  abcd is a parallelogram &  bc=cd..(i)

abcd is a parallelogram So, ab = cd & bc =ad ...(ii)

From equation (i) and (ii) 

ab = bc = cd = ad

And angle a is 90 degree.

Hence abcd is a square.

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