- Circle formulae
Circle formulae

- Circumcircle of a triangle
This online calculator determines the radius and area of the circumcircle of a triangle given the three sides

- Counting pipes from the end face
The approach to the calculation of the number of nested circles of smaller radius at a known length of the describing circle of a larger radius. Created by user request

This online calculator finds number of sides and length of side of regular polygon given the radii of incircle and circumcircle

- Incircle of a triangle
This online calculator determines the radius and area of the incircle of a triangle given the three sides

- Regular polygon. Incircle and circumcircle
This online calculator determines parameters of circumcircle and incircle of a regular polygon

- Side length of the regular polygon
Calculates the side length of the regular polygon circumscribed or inscribed to a circle. Created by user's request