A parallelogram is a quadrilateral whose opposite sides are parallel and equal, opposite angles are equal, the sum of the interior angles is 360 degrees. Therefore, the parallelogram EFGH might be a rhombus.
11349.05 (and whatever unit of measurement it would be)
The volume is 56745.25, and 80% of that would be 45396.2. In order to find the 20%, or how much water you need, you would subtract 45396.2 from 56745.25 and that leaves you with 11349.05.
First, draw a circle with point U as the center point and point S as the end of the radius. Then, draw another circle with point D as the center point and the radius length equal to US. Next, draw ray DE away from angle SUN. Finally, draw angle SUN.