It depends if you have a 3 piece crank, spokes, brakes.
Tyres/tires are the rubber things that makes contact with the ground, they don't come with spokes. Rims are the (usually) metal hoops that the tyres/tires sit on, and they too usually don't come with spokes. Wheels consist of hub, spokes, and rim when you buy them. To make them rideable you need to add tyres/tires and tubes.
Spokes are the thin metal rods that run from the hub(the center of the wheel) to the rim( the hoop where the tire sits). Inches usually refers to the approximate size of the wheel, 20" for BMX, 26" for MTB, and 28" for road bikes.
Kinda-sorta. If the new rim has the exact same diameter where the spoke nipples are, then you can reuse the old spokes and hub. Easiest way to do this is to tape the new rim alongside the old one. As long as you get the alignment right(valve hole, and left/right staggered spoke holes...) you just move one spoke at the time over and you're done. Keep in mind that it'll take e it apart, but be sure to check the hub to make sure that it won't be seized or the flange is broken and the spokes aren't broken too on the old wheel.
You measure it. A ruler and a caliper are useful.
The angle is pi/4 radian. If you are at an early stage in studying mathematics, that is 45 degrees.
working from back to front: tyre, innertube, rim, spokes, nipples, hubs, frame, cranks, pedals, sprocket, seat clamp, seat post, seat, bars, grips, bar ends, stem, headset, top cap, forks, hubs, spokes, nipples, rim, innertube, tyre :)
A wheel with 64 spokes will have 64 spaces between the spokes.
At the point where your wheel hits the ground, the rim flexes a little bit. The spokes that support this section of the rim also flexes, and then snaps back as soon as this spot of the rim rotates past this point. This creates a 'ping" sound as the spokes pop up against each other where they cross.
There are many types of spokes. Some are the spokes on a bicycle, another are the spokes on a wheelchair, or you can even find them on baby carriages.
The Spokes was created in 2004.
A wheel with 10 spokes will have 10 spaces between the spokes.