- Right angle (Wikipedia)
In geometry and trigonometry, a right angle is an angle of exactly 90 degrees or 𝜋/2 radians corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles. The term is a calque of Latin angulus rectus; here rectus means “upright”, referring to the vertical perpendicular to a horizontal base line.
- In a right triangle, a cathetus (originally from the Greek word Κάθετος; plural: catheti), commonly known as a leg, is either of the sides that are adjacent to the right angle. It is occasionally called a “side about the right angle”. The side opposite the right angle is the hypotenuse. In the context of the hypotenuse, the catheti are sometimes referred to simply as “the other two sides”.
- Starship Troopers (film) (Wikipedia)
Starship Troopers is a 1997 American military science fiction action film directed by Paul Verhoeven and written by Edward Neumeier, based on the 1959 novel by Robert A. Heinlein. Set in the 23rd century, the story follows teenager Johnny Rico and his comrades as they serve in the military of the United Citizen Federation, an Earth-based world government engaged in an interstellar war against an alien species known as the Arachnids. The film stars Casper Van Dien, Dina Meyer, Denise Richards, Jake Busey, Neil Patrick Harris, Patrick Muldoon, and Michael Ironside.
- 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).