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A circle is inscribed in an equilateral ...

A circle is inscribed in an equilateral triangle with side lengths 6 unit. Another circle is drawn inside the triangle (but outside the first circle), tangent to the first circle and two of the sides of the triangle. The radius of the smaller circle is

A

`1/sqrt(3)`

B

`2/3`

C

`1/2`

D

1

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The correct Answer is:
A
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