The Vietnamese word "mặt phẳng" translates to "plane" in English. It is a noun used primarily in geometry and mathematics to describe a flat, two-dimensional surface that extends infinitely in all directions.
In Geometry:
In Real Life:
While "mặt phẳng" primarily means "plane" in a geometric sense, it can also be used metaphorically in some contexts to describe a level or flat situation, such as in discussions about equality or fairness (e.g., "mặt phẳng xã hội" - social plane).