Set of circles, circumferences, perimeters and pi, with 2 discs.

Função

Intended for experimental study, mathematics laboratory work, and conducting mathematical experiments on: Mathematics. Plane and metric geometry. How to obtain the number pi in a circle? The circumference, the radius, the circle, and the perimeter. The radius and diameter of the circumference. The number pi. Drawing reference lines corresponding to the diameter of each circle. Measuring the different perimeters of different circles (circumferences). The graph of the circumference length C versus the diameter D. Graph of the function f(D). First-degree polynomial function, or affine function. The equatorial perimeter of the Earth, etc.