The Pythagorean theorem states that: In any right triangle, the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares whose sides are the two legs (the two sides that meet at a right angle).
The Forgotten Silver Kennedy Half Dollars. Released into circulation in the mid 1960's and 1970, silver Kennedy half dollars represent the end of an era in circulating silver US coins. Additionally, these early halves are significantly more valuable than today's modern half dollars. The opportunity to you is most people don't realize, or remember, they contain a large amount of silver. Let's start with the first year 1964, a very special year. In 1964 the new silver Kennedy half dollars were introduced and contained a hefty 90% silver content. The minimum value is $6.00 each.
silver dimes and quarters after the introduction of clad coins in 1965; officially, silver and clad coins were of equal value, but as soon as people began to realize that the silver was worth much more, they stopped using silver as money.