squaring off sheet boards advice

[GlennSpray68]

Hi all, I have some cabinets to build and I'm going to use pocket screws. My problem is I have a lot of offcut's which unfortunately are not square. Can anyone suggest a good method for squaring off the offcuts' before I start building the cabinets. I have a speed square, framing square which I have checked for squareness and a circular saw and diy track guide. Most of the offcuts' don't have any 90 degree corners so I'm struggling a bit with where to start.
Many thanks in advance for your help.
Glenn

 

[foxhole]

Just use your square off the longest straight edge.Work your way round.

 

[GlennSpray68]

Thanks seems so simple,I'll give it a try