- Space Invaders (Atari 2600) online game (atarionline.org)
Space Invaders, developed by Tomohiro Nishikado in 1978, is a groundbreaking shoot ’em up arcade game that set the standard for the genre. The objective of the game is to eliminate waves of descending aliens using a horizontally-moving laser, accumulating as many points as possible in the process.
- Right triangle (Wikipedia)
A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular forming a right angle (1⁄4 turn or 90 degrees).
