trzy

In a sentence

• Mam trzy książki na półce.

  I have three books on the shelf.

  The word 'trzy' is used as a cardinal numeral indicating the quantity three.

• Podziel ciasto na trzy równe części.

  Divide the cake into three equal parts.

  The word 'trzy' identifies the number of segments into which the cake should be divided, used here as a numeral.

• O godzinie trzy spotkajmy się na rynku.

  Let's meet at the market at three o'clock.

  Here, 'trzy' specifies the exact time of the meeting, used as a cardinal number for time identification.