The side lengths of a right triangle form a so-called Pythagorean triple. A triangle that is not a right triangle is sometimes called an oblique triangle. Special cases of the right triangle include the isosceles right triangle (middle figure) and 30-60-90 triangle (right figure).
The first pacemaker was implanted on 8th October 1958 in a 43 year old man called Arne Larsson with complete heart block and Stokes-Adams attacks. Technological innovations between 1973 and 1980 rendered obsolete the reliable pacemaker of 1970.
The original Schwinn Stingray was made between 1963 to 1981. This page provides year by year images and information quoted from Schwinn catalogs. Here is how Schwinn described the Stingray bicycle... STING-RAY THE BIKE THAT CHANGED CYCLING. Sting-Ray,known as the bike with the sports car look has revolutionized cycling since it was introduced by Schwinn in 1963. It has won the praise and captured the imagination of youngsters of all ages across the U.S.A.