Right angle of what a right angle is, namely two straight lines intersecting to form two equal and adjacent angles. The straight lines which form right angles are called perpendicular. Euclid uses right angles in definitions 11 and 12 to define acute angles (those smaller than a right angle) and obtuse angles (those greater than a right angle). Two angles are called complementary if their sum is a right angle. Book 1 Postulate 4 states that all right angles are equal, which allows Euclid to use a right angle as a unit to measure other angles with. Euclid's commentator Proclus gave a
98 Degrees 98 Degrees 98 Degrees (stylized as 98°) is an American pop and contemporary R&B vocal group consisting of four vocalists: brothers Nick and Drew Lachey, Justin Jeffre, and Jeff Timmons. The group was formed by Timmons in Los Angeles, California, although all of its members originate from Ohio. Unlike most boy bands, they formed independently and were later picked up by a record label, rather than being assembled by a label or a producer. They have sold over 10 million records worldwide and achieved eight top 40 singles in the U.S. The group reunited for a one-time performance at Mixtape