I built this console table that can be easily adjusted to suit whatever space you are working with. The utility panel I used for this piece is 1200 x 300.
The base is straightforward once you break it down. I wanted the width of the base to match the width of the utility panel, so I went with a 15 degree cut at the bottom.
The top would then be 75 degrees (subtract the bottom cut angle from 90 degrees, so in this case 90 minus 15). I did a mockup in Adobe Illustrator to identify the lengths of the cut based on the dimensions I needed it to be.