My (in a former life) math teacher husband told his students, when they asked, "When will we ever use this stuff?", that they will be surprised. Surprise! Your math skills do come in handy with quilting and you've even found a fun way to use them. Now he has a custom cabinet shop and uses his geometry skills quite often making arches and angles in the cabinets. He even keeps his fancy smancy calculator in the shop to help him use some of his advanced math skills. Tell you kids to pay attention in math, they'll be surprised how often it will come in handy.