Because "the circular area is equal to 7 times of 1 square, which is 3/3 of the diameter"; Is the area of the circumscribed regular polygon πR again? ; If it is assumed that r can be equal to r, then the area of a circle inscribed with a regular polygon is πr? .

Since the radius r is always greater than the chord center distance r in reality, "the semi-circumference πR of a regular polygon multiplied by the chord center distance r is equal to the area s of a regular polygon inscribed with a circle. Formula: s=πRr.

brief introduction

Area is a quantity indicating the degree of a two-dimensional figure or shape or plane layer in a plane. A surface region is a simulation on a two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness, which is necessary to form a shape model, or the amount of paint required to cover a surface with a single coating. It is a two-dimensional simulation of curve length (one-dimensional concept) or solid volume (three-dimensional concept).