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2005 In Education
5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. Humans, and many other animals, have 5 digits on their limbs. Mathematics 5 is a Fermat prime, a Mersenne prime exponent, as well as a Fibonacci number. 5 is the first congruent number, as well as the length of the hypotenuse of the smallest integer-sided right triangle, making part of the smallest Pythagorean triple ( 3, 4, 5). 5 is the first safe prime and the first good prime. 11 forms the first pair of sexy primes with 5. 5 is the second Fermat prime, of a total of five known Fermat primes. 5 is also the first of three known Wilson primes (5, 13, 563). Geometry A shape with five sides is called a pentagon. The pentagon is the first regular polygon that does not tile the plane with copies of itself. It is the largest face any of the five regular three-dimensional regular Platonic solid can have. A conic is determine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5 BC
__NOTOC__ 5 BC was a common year starting on Monday or Common year starting on Tuesday, Tuesday of the Julian calendar (the sources differ, see Julian calendar#Leap year error, leap year error for further information) and a leap year starting on Saturday of the Proleptic Julian calendar. In the Roman world, it was known as the Year of the Consulship of Augustus and Sulla (or, less frequently, year 749 ''Ab urbe condita''). The denomination 5 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events * March – Probable nova in the constellation Aquila (constellation), Aquila. * c. December – Probable supernova in the constellation Capricornus. Births * January 15 – Emperor Guangwu of Han, Guang Wu, Chinese emperor of the Han dynasty, Han Dynasty (d. AD 57) * Aemilia Lepida (fiancee of Claudius), Aemilia Lepida, Roman noblewoman and fiancĂ©e of Claudius (d. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
