There are 7 different shapes, but some handheld variations add more.
An infinite number.
Tetris
true
True
In tetris (an animated computer game), shapes (each made of four squares) fall from the top to the bottom, and you use the D-pad to rotate and place the shapes so that they fill rows and disappear to stay low. As the game progresses, you reach higher levels, and the blocks descend faster. If the blocks stack up to the top, you lose the game.
147,4570
The game you're describing sounds like "Tetris." In Tetris, various shapes made up of four blocks, known as tetrominoes, fall from the top of the screen, and players must rotate and move them to fit together in a horizontal line without gaps. When a line is completed, it disappears, earning points and preventing the shapes from stacking up to the top of the screen. The game continues until the player can no longer place the falling shapes.
In tetris you must attempt to gain the highest score possible by placing large block shapes in a manner that results in a straight, one block high, unbroken line across the screen, which will then disappear. You will receive more points if you create more than one line at a time, with four lines being a tetris.
base (legs are the two congruent sides)
false
False.
There are infinitely many such shapes. There are infinitely many such shapes. There are infinitely many such shapes. There are infinitely many such shapes.