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.
So, the area is approximately 21 because: 12 + 3 + 4 + 2 = 21 squares in all. 3. The problem says the perimeter is 286 units and the length of the rectangle is 76 units. Therefore, two sides equal 152 units because: 76 + 76 = 152. Next, subtract 152 from the perimeter to determine the total of the other two sides.