Defining Area Area is the quantity that expresses the extent of a two-dimensional surface. It is commonly measured in square units.
Area of a Square The area of the square is simply the product of one of the sides multiplied by itself.
Area of a Rectangle The area of the rectangle is the product of the length and width of the shape.
Area of a Triangle The area of a triangle is the product of the base multiplied by the height divided by two.
Additional Learning http://www.mathsisfun.com/area.html This link shows the formulas for some basic shapes. http://www.csgnetwork.com/areacalc.html This link will automatically calculate the area of some basic shapes, once you enter the dimensions.