After the age eligibility rule was instituted by the Women's Tennis Association, career lengths increased significantly. Before the rule was established, there were concerns that athletes who engage in professional sports at a very young age experience shortened careers and in most cases leave prematurely before even getting to their peak. However, the rule has helped in reducing premature retirement immensely.
The measure of an inscribed angle is half the measure of the intercepted arc. That is, m∠ABC=12m∠AOC. This leads to the corollary that in a circle any two inscribed angles with the same intercepted arcs are congruent.
Tony Williams joined Miles Davis at the remarkably young age of 17, in 1963. He left right after recording In A Silent Way to concentrate on power-trio Lifetime with John McLaughlin and organist Larry Young
