- A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius.
- Asteroids (Atari 2600) online game (atarionline.org)
Asteroids for the Atari 2600 was a well-received adaptation of the popular arcade game. The game was developed and published by Atari in 1981, making it accessible to home console players. Although the graphics were simplified due to the hardware limitations of the Atari 2600, the gameplay remained mostly faithful to the original arcade version.
