If it's not proof or a very high mint state coin, it's face value
The coin is still in circulation today and has face value only
A 1972 Washington quarter is just a quarter, many are still in circulation.
a dollar
value of 1845 us five dollar coin
One dollar.
It's a common dollar coin that's face value
One dollar.
There was no fifty dollar US gold coin produced in 1940.
$1.00
No, there have been many US dollar coins struck before and after 1972. However, the US Mint did make a dollar coin in 1972 (it was the second year for the Eisenhower Dollar)
Check that coin again. The U.S. has never minted a two dollar coin.