How many differently shaped Tetris pieces are there?

There are seven different shapes of Tetris pieces because the game is designed based on a set of seven distinct geometric shapes, known as tetrominoes. Each of these pieces is composed of four squares joined together in different configurations: I, J, L, O, S, T, and Z. These shapes are carefully chosen to provide a diverse and challenging gameplay experience, allowing players to rotate, stack, and manipulate them within the playing field to clear rows and maximize their score. The seven different pieces create the foundation of the classic and addictive puzzle game Tetris.