About this app
To calculate the circumference of a circle, all you need to know is:- diameter,
- radius,
- area of a circle,
- the diagonal of the inscribed rectangle,
- the side of the circumscribed square,
- sides and area of an inscribed triangle,
are the area and half-perimeter of the circumscribed triangle,
side of an inscribed regular polygon.
The purpose of this application is the education of cognitive interest in mathematics.
