1.

Each of the two circles of same radius a passes through the centre of the other. If the circles cut each other at the points A, B and 0,0' be their centres, then area of the quadrilateral AOBO' is

Answer»

`1/4a^2`
`1/2 a^2`
`SQRT(3)/2a^2`
`a^2`

ANSWER :C


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