How do you find the base area of a box?

Answer 1

Think about the flat of the box that sits on the floor. It's a square or a rectangle,

and that's the only part of the box you're interested in, so forget about the rest.

That square or rectangle has a length and a width, which you can easily measure.

Once you measure them, multiply them, just as you would with any other square

or rectangle to find its area.