|Instructions: In "spin" mode it freely spins and will respond to your mouse. In "drag" mode it stops spinning and you can use your mouse to move it.
Volume of a Cylinder
Just multiply the area of the circle by the height of the cylinder:
- Area of the circle: π × r2
- Height: h
- Volume = Area × Height = π × r2 × h
There is an easy way to remember:
Imagine you just cooked a pizza.
The radius is "z", and the thickness "a" is the same everywhere ... what is the volume?
Answer: pi × z × z × a
(we would normally write "pi" as π, and z × z as z2, but you get the idea!)
It Doesn't Have to Be Circular
|Usually when we say Cylinder we mean a Circular Cylinder, but you can also have Elliptical Cylinders, like this one:
You can even have stranger cylinders: if the cross-section is curved and is the same from one end to the other, then it will still be a cylinder.