The term 'rectangular' is often used to describe everyday objects with four straight sides and four right angles. He put his rectangular phone on the charger.
Pro Tip 2/3
Visual Imagery
Use 'rectangular' to help visualize objects when providing descriptions in both spoken and written English. A rectangular sign was posted at the entrance.
Pro Tip 3/3
Not Always Square
Remember that although all squares are rectangles, not all rectangles are squares; the sides can be unequal. The rectangular garden had two longer sides.