The equation to the base of a equilatera...

The equation to the base of a equilateral triangle is `x+y=2` and one vertex is (2,-1). The length of the side is

A

`sqrt(2//3)`

B

`1//2sqrt(3)`

C

`sqrt(3//2)`

D

`2//sqrt(3)`

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The correct Answer is:

A

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