plaska

In a sentence

• Ten blat stołu jest płaski.

  This tabletop is flat.

  In this sentence, "płaski" describes the flat, even surface of the tabletop, functioning as an adjective.

• Czy powierzchnia ziemi jest naprawdę płaska?

  Is the surface of the Earth really flat?

  Here, "płaska" is used inquiring about the flatness of Earth's surface, also as an adjective.

• Stosuję płaskie narzędzia do tego projektu.

  I use flat tools for this project.

  In this example, "płaskie" characterizes the shape or design of the tools suitable for the project, functioning as an adjective.