There are a variety of modern definitions of economics, some reflect evolving views of the subject or different views among economists.
So the area of the square is 7 x7 = 49 cm^2 and the perimeter of the square is 7 x 4 = 28 cm. And in example 1 you have a square of side length 8cm and you need to work out the area and perimeter of the square. So the area of the square is 8 x8 = 64 cm^2 and the perimeter of the square is 8 x 4 = 32 cm.
For any regular polygon, the area can also be expressed in terms of the apothem, a = r, and perimeter, p = 6 R = 4 r 3 {\displaystyle {}=6R=4r{\sqrt {3}}} : The regular hexagon fills the fraction 3 3 2 Ï â 0.8270 {\displaystyle {\tfrac {3{\sqrt {3}}}{2\pi }}\approx 0.8270} of its circumscribed circle.