1.

An equilateral triangle ABC is inscribed in a circle centered at O and of radius 4 cm, as shown below. OD is a radius such that it is perpendicular to BC and cuts BC at point E. Then the length of OE is

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An equilateral triangle ABC is inscribed in a circle centered at O and of radius 4 cm, as shown below. OD is a radius such that it is perpendicular to BC and cuts BC at point E. Then the length of OE is




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