What is the base of a parallelogram with an area of 24 ft.² in height of 3 feet

The area of a parallelogram is equal to the base times the height.

A = b * h

In this case, you need to find the base. Your equation looks like this:

24 = 3 * b

Using reverse operations, divide both sides by 3.

8 = b

So, now you know that the base is 8 feet long.