To understand how this technique works, you'll need to know these 4 key characteristics:

4 Key Characteristics

1. The front side facing us will always be flat. 
2. The shape will not shrink as it moves further back but remains the same.
3. All perspective lines (the lines that lead back, are all parallel)
4. The angle will usually be 45° or 30° (but can be any angle really) and all edges will have the same length.