It depends on what you mean by sides but I suppose you mean not the faces. There are 11 sides which makes it a hendecagon.

Yes, the 20 dollar bill is worth 20 dollars. Imagine that.

Canada struck its first $1 coin in 1935. Please check your coin again and post a new question with additional information. The monarch's name (it'll be shown with a Latin spelling) and a short description of the coin's design would be the 2 most helpful items.

The Loon, or Loony. From the picture of the Loon Duck on the obverse

An uncirculated $20 bill from 1954 is worth $350-$400 in mint uncirculated condition and about $30 in crisp circulated.

un-circulated ones can be worth up to $1000

Actually about $100 if it is a proof or specimen coin as these are 50 percent silver the non-proof version is 99.9 percent nickel making it less valuable. They are a nice coin and hard to come by but who ever put $1000 is a bit off

if the bill belong to ninetheen century price is almost $4000.

Without seeing the coin it's not possible to give a value. There were several varieties of Centennial dollars issued and values range from a few bucks to a couple of hundred depending on the type. If it's from circulation, it's probably only worth about $10 due to its silver content. If it's a proof coin it could be worth more, but you'd need to have it appraised in person.

Jan 2018 : $1 USD = $1.25 CAD

eBay has a good reputation as a means of selling goods on the Internet to a world wide market.

Alternatively, you could try a local coin dealer, auction house, pawn shop or similar, or even a Second Hand Dealer. Each have their merits and shortcomings.

For decimal coins, unless they are proof or uncirculated or have something about them that makes them sought after as a collectible, you are unlikely to get any more than face value for them.

Depending on what country you live in, some banks or central issuing agencies may exchange recently demonetised coins for an equivalent value or, you could keep them for your grandchildren.

20

in virtually flawless, crisp uncirculated condition, it's worth about $5

.935 as of today in USA (Sept. 20, 2009)

Or 100 Canadian cents equals 1 Canadian dollar.

It is worth about $2-$7 in good to mint condition.

The value of coins and paper money can vary drastically depending on year, condition, and stamping. However, a one dollar bill stamped as 1861 is most likely a worthless counterfeit. 1863 was the first year for a United States $1 bill.

Millions of Canadian one dollar bills were printed in 1937. There are four distinct varieties based on their portraiture. They are generally worth between and couple of dollars to one hundred dollars depending on their condition and rarity.

Actually, like all countries Canada still uses money. Canadian coins and bills have had many different images on them, far too many to describe easily. There are pictures and more information at the related links below.

A crisp, very good quality circulated 1954 $50 note is worth $80-$90. A mint condition uncirculated one is worth $1000-$1500.
In 2009 the 1954 $50 bill can fetch up towards the $800-$850 mark.
Without tears however can fetch towards $1200-$1350