Ditto -- I used to teach Geometry and wish I had been quilting then so I could really show folks how much it is used. I also use algebra and a bit of trig too in my quilting. Wish I could have brought a carpenter into Geometry too since that is another occupation that uses a lot of math -- DH had real issues figuring out how much the saw reduces the cut and I sometimes obsess about the width of the lines on the ruler.......