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Question

If a square is inscribed in a circle with centre 'o' as shown .Then the perimeter of the square given that the radius of the circle is 'a':

  


  1. a

  2. 2a

  3. a2

  4. 22a


Solution

The correct option is B

2a



Let the side of ht square be x
In ΔBCD
BC2+CD2=BD2
2x2+4a2
x2=2a2
x=2a

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