трета

In a sentence

• Той живее на третия етаж.

  He lives on the third floor.

  The word 'третия' is the masculine form of 'third,' used here as a descriptor for the 'floor'.

• Тя е третата в списъка.

  She is the third on the list.

  The word 'третата' is the feminine form of 'third,' indicating her position in the list.

• Можеш ли да повториш третата дума?

  Can you repeat the third word?

  Here 'третата' is again the feminine form of 'third,' describing the specific word to be repeated.