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The radius of the circle  x^2+y^2=1 is

Option: 1

1


Option: 2

\sqrt2


Option: 3

2


Option: 4

-1


Answers (1)

best_answer

The equation of circle is x^2+y^2=a^2

Compare it with x^2+y^2=1

\\a^2=1\\a=\pm1\\radius\;is\;1

As radius can't be negative

Posted by

Nehul

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