It has at least two radii, the radius of the circle going through the vertices and the radius of the inscribed circle touching all the sides.
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A radius of a regular triangle is 12 . find the length of one side of the triangle?
Centre of area of a triangle is the centre point for a circumscribed radius which will pass through all 3 vertices of the triangle.
Using the cosine rule the biggest angle is: 82.81924422 degrees Using radius formula for circumcircle of a triangle the radius is: 3.023715784 cm
Where the side of the equilateral triangle is s and the radius of the inscribed circle is r:s = 2r * tan 30° = 48.50 cm
you have a triangle formed by the radius on 2 and the chord on the other. the angle in that triangle that is opposite the chord, find its measure in radians take that measure (in radians) and multiply it by the radius to get the arc length