(7). The hypotenuse of a right triangle is a diameter of the triangle's circumcircle, so the circumradius is given by. (8). A primitive right triangle is a right triangle having integer sides, , and such that, where is the greatest common divisor.
In July 1984, New York State passed the first mandatory seatbelt law in the nation, followed by New Jersey, Illinois, Missouri, Michigan, and New Mexico. 1 person found this useful.
Answer: Beginning in 1967, all new cars and those manufactured since January 1, 1965, were required to be fitted with front seat belts. In the 1970s, national advertising campaigns were conducted to encourage people to wear seat belts. The first proposals for the compulsory use of seat belts were made in 1973. On January 31, 1983, the use of seat belts in the front seats of cars became federal law for a three-year trial period. Injury and fatality statistics during this time convinced lawmakers that the use of seat belts saved lives and dollars. New cars have had to be fitted with rear seat belts since April 1987. Since September 1, 1989, children under the age of 14 have been required to wear seat belts in the backseats of cars.