Final answer:
The geometric shape of the rectangular piece of paper is a rectangle.
Step-by-step explanation:
The geometric shape of the rectangular piece of paper is a rectangle (option D).
A rectangle is a quadrilateral with four right angles (90 degrees each) and opposite sides that are congruent. It has two pairs of parallel sides.
For example, if the paper has a length of 10 centimeters and a width of 5 centimeters, it would be a rectangle because it has four right angles and opposite sides of equal length.