it is a good luck charm and it is not a coin
The Front of a coin is the heads side Known as the obverse. The Back of a coin is the tails side "reverse".
A Lincoln Memorial penny. Lincoln is on the front, of course, and there's a tiny image of the statue visible inside the Memorial on the back.
If you mean a 2009 dollar coin with Sacagawea on the front and a Native American woman planting corn on the back it's not an error. it's just a dollar.
3 the front the back and the edge
See the link to Angel below
It can only be on the front, back or edge of a coin.
From your description, the coin is a 2010 Native American dollar coin. The date and mintmark is on the edge of the coin. Unless it's a Proof coin, value is $1.00.
Heads. The obverse is the front of the coin. Its opposite (the back of the coin) is the reverse.
It has a woman on the front, and trees on a beach on the back. It is a very lovely coin.
"Obverse" refers to the front of the coin (usually the side with the portrait), as versus the "reverse", or back, of the coin.
It varies but the original sacajawea coin had a flying eagle on the front and then a picture of sacajawea with a baby on the back, the baby is in some sort of "back pack" thing.