Name an angle complementary to Complementary angles add up to 90 degrees. COA is supplementary to AOE (they add up to 180) AOB is 90 degrees AOD is 180 degrees COB is complementary to COD. And because COD is congruent to AOE (because vertical angles are congruent), COB is also complementary to AOE. So our answer is COB.
Mad Libs was invented in 1953 by Leonard Stern and Roger Price. Stern and Price co-created the game, but couldn't agree on a name for their invention. No name was chosen until five years later (1958), when Stern and Price were eating eggs Benedict at a restaurant in New York City.
The answer to this question depends on your definition of a computer. The earliest computers were mechanical devices used to help people count. The first known counting devices or tools were Tally Sticks from about 35,000 BCE.The abacus was invented, possibly by the Babylonians or the Chinese in about 2400 BCE.   The first of the modern computers was invented during World War II, in 1941 by a German engineer named Konrad Zuse. The computer was called the Z3 and was used to help design German airplanes and missles.