Area of a circle Why this formula
Area of a circle Why this formula
A circle is a figure of the plane formed by a set of points which are all located at the same distance from the center. The circumference (C) of a circle is its perimeter, that is to say the length of the line which delimits the contour of the circle. The area of a circle is the area contained within the circle. That either the area or circumference, calculation is easy: you only need the radius or diameter and pi.
but the question arises why the area of a circle is equal to πr2 ?
then this video to adequately explain
