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For a regular polygon, let r and R be th...

For a regular polygon, let r and R be the radii of the inscribed and the cirumscribed circles, respectively. A false statement among the following is
(a)there is a regular polygon with `r/R=1/2`
(b)there is a regular polygon with `r/R=(1)/(sqrt2)`
(c)there is a regular plygon with `r/R =2/3`
(d)there is a regular plygon with `r/R=(sqrt3)/(2)`

A

There is a regular polygon with `r/R=1/2`

B

There is a regular polygon with `r/R=1/sqrt2`

C

There is a regular polygon with `r/R=2/3`

D

There is a regular polygon with `r/R=sqrt3/2`.

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