window repair shop
 

this happened to me and i took it to the window repair sho they have a secial glue to repair plexi glass the man glued it for me and dident charge me anything...i was so greatful so i went and bought him an iced coffee he was happy and so was i lol hope this help you.......

forget about gluing together. It will never be right. Use the two pieces for smaller cutting and purchase a new ruler

I would try the clear packing tape. It was a freebie, so what have you got to lose if it doesn't work.

Yes. Definitely. there is a kind of glue--as one lady said, maybe it is called "gorilla glue" that actually melds the pieces back together. Or maybe it is acetone....

On you tube, check out gluing acrylic. It is really a lot easier than I knew.

I had a foot break on my embroidery machine. At the time we had a visitor and he said, "I can fix that" (after I had ordered a new one). And he proceeded to do so. It is fine. Now I have the new one and the old one.