Draw an equilateral triangle of side 8 cm and its circumscribed circle. Find the length of the radius.

2.61 cm

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8.4 cm

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4.61 cm

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6.0 cm

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Solution

The correct option is C
4.61 cm

Draw the perpendicular bisectors of any two sides of the triangle.

Let the perpendicular bisector of AB and AC be drawn which meet at point O.

Taking, O as the centre and radius equal to OA (or OB or OC) draw the circle.

Measure OA, circumradius = 4.61 cm

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