Volume

The Basics of How to Find the Volume of 3D Solids

Volume Of A Cube = Side × Side × Side

Volume Of A Cuboid (Rectangular Prism)
= Length × Width × Height

Volume Of A Composite 3D Shape
Volume Of An Irregular 3D Solid
Example - Finding The Volume Of A Staircase Shape

Volume Of A Pyramid
= One Third × Area of Base × Height

Volume Of A Cylinder
= Area of Base × Height

Volume Of A Cone
= One Third × Area of Base × Height

IMPORTANT
When we talk about the height of a cone
we mean the actual VERTICAL HEIGHT of the top from base
we do NOT mean the length of the slant
this is sometimes called called the slant height
but it would be clearer to call it the slant length

Volume Of A Cone
Given The Length Of The Slant (May Be Called Slant Height)

Volume Of A Sphere
= Four Over Three × Pi × Radius Cubed

Volume Of A Sphere
This Video Derives The Formula For The Volume Of A Sphere
Using The Formula For The Surface Area Of A Sphere

External Link - Advanced
mathworld.wolfram.com