The side of a regular triangle A is 9 cm, then the radius of the circumscribed circle around it is …
| January 15, 2021 | education
Find the radius of a circle circumscribed around a regular triangle with a side of 9 cm.
The formula for finding the radius in this case:
R = a / √3, where a is the side of an equilateral triangle.
R = 9 / √3 = 9 * √3 / 3 = 3√3
Therefore, the correct answer is option B, R = 3√3 cm
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