Geometry in marching band. Marching band isn’t all about playing music and counting. In marching band you have drill, which is a picture representation of all the different shapes and forms the band makes as a whole. There is surface area involved because you need to know the dimensions of the stadium. Here is a website I used

https://prezi.com/c9_ivr4pgrvh/how-is-geometry-used-in-marching-band/