The below is the method for approximation of π. Fill in the blank. (Use √2=1.414, √3=1.732, √6=2.449) Triangle ABD is an isosceles triangle.
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A regular polygon can be both inscribed and circumscribed.
The side, which is not a radius, of a triangle in circumscribed 12-gon is .
The side, which is not a radius, of a triangle in inscribed 12-gon is .
,
Thus,
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