Bi is for two and cycle is for cyclic, something that goes around. Another way of saying two spinning wheels basically.
"Bi" means two, and "cycle" means a full-circle or revolution - as in the wheels. Thus, the contraption with 2 wheels going around was termed"bi-cycle"!
If you mean why bicycles are useful:
Because you have to keep pushing the pedals to make them go anywhere.
From the Latin derivation of movement and double.
madness!
The earliest forms of bicycles did not have pedals, they were pushed along by the feet of the seated person.
Tricycles, 3 wheeled bicycles, or 3 wheeled bike.
A person who rides bicycles is called a cyclist.
That'll usually be a trial bike.
Yes there are, and they're called tandem bicycles.
The earliest bicycles were also called hobby horses or boneshakers.
If the bicycles belong to ONE FRIEND, it's "friend's bicycles." If the bicycles belong to TWO OR MORE FRIENDS, it's "friends' bicycles."
1.8 bicycles.
There is no specific collective noun for bicycles, in which case a noun suitable for the situation is used, for example a rack of bicycles, a row of bicycles, a standof bicycles, etc.
what did the ancient bicycles look like?
Bicycles weren't invented in Canada.