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.
The shaded space will have an area equal to the area of the square minus the area of the circle. Let's call the area of the square Q and the area of the circle C. So you're looking for Q-C. You're given the width of the square as 7.haded Area = Area of the Square-Area of the Circle Area of square = 7 x 7 = 49unitsÂ² Area of circle = 3.5Â² x Ï = 12.25Ï unitsÂ² Shaded Area = 49unitsÂ² - 12.25Ï unitsÂ² = 10.52 unitsÂ² Hope that helps. =D.