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.
A square inch is a unit of area in both US Customary Units as well as the Imperial System. The symbol for square inch is in2 or sq in. There are 1,550.00310001 square inches in a square meter. A square inch is calculated as the area of a square that has 1 inch on each side. A square meter is a unit of area in the Metric System. The symbol for square meter is m2. There are 0.00064516 square meters in a square inch. A square meter is calculated as the area of a square that has 1 meter on each side.