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
Wilt: Larger than Life Wilt: Larger than Life Wilt: Larger Than Life () is a biography of deceased NBA basketball Hall-of-Famer Wilt Chamberlain, written by journalist Robert Cherry. The 416-page book was published in November 2004 by Triumph Books. The foreword is written by Jerry West, Chamberlain's teammate and friend on the Los Angeles Lakers. It is the only biography of Wilt Chamberlain to be released after his death. The book chronologically spans the entire life of Wilt Chamberlain, starting with his roots in middle class Philadelphia, highlights his rise to young basketball prodigy in Overbrook high school and at Kansas University, follows his