Area, Perimeter and Diagonal of a Rectangle  Calculator

An easy to use online calculator to calculate the area, perimeter and diagonal of a
area A and perimeter P of a rectangle given its dimensions (length and width).
How to use the calculatorEnter the length L and width W as positive real numbers and press "calculate". The outputs are the area A, perimeter P and diagonal D of the rectangle.
More References and linksOnline Geometry Calculators and Solvers. 