You will need
  • Know of sides of the polygon, its area/perimeter.
Instruction
1
The calculation of the radius of the circumscribed around the triangle of the circle.
If a circle circumscribed around the triangle with sides a, b, c, area S and angle ?, lying up against the side a, the radius R can be calculated by the following formulas:
1) R = (a*b*c)/4S;
2) R = a/2sin?.
How to find the radius of the described <strong>circle</strong>
2
The calculation of the radius of a circlecircumscribed around a regular polygon.
To calculate the radius of a circlecircumscribed around a regular polygon, you need to use the following formula:
R = a/(2 x sin (360 / (2 x n))) where
a - side of a regular polygon;
n is the number of sides.
How to find the radius of the described <strong>circle</strong>