I would sandwich the sheet between plywood. Then I would have to decide what to use to cut it. My first choice would be mt tablesaw with the blade set as low as possible and still sever the sheet.
Second choice would be a mini-circular saw like this:
https://www.walmart.com/ip/Rockwell-Rk3440K-Versacut-4-0-Amp-Mini-Circular-Saw-Kit-With-Laser/20434561?athcpid=20434561&athpgid=athenaItemPage&athcgid=null&athznid=PWVUB&athieid=v0&athstid=CS020&athguid=ce537e76-f29-167d40feff1bd1&athena=true
Third choice would be my bandsaw. Probable with a 12 -14 tpi blade