http://mathrelationstodance.blogspot.ca/

This site is very similar to

https://maddywoolwine.wordpress.com/2014/10/24/the-mathematical-reasoning-behind-dance/

These two sites have multiple ways math is in ballet. These 2 sites also explain why they think this form of math is useful to a dancer. This site talks about musicality, balance, and angles. The dancer must understand how to transfer their weight or else they’ll lose their balance. They must also know 90 degrees and 45 degrees or higher because when a dancer lifts their leg they must know when to stop or else they will go to high.

This was useful because now I can gather more information on geometry symmetry and counting. This site also explained angles which was very helpful. Now I understand how to keep my balance properly and why my dance teachers always say that we have to count.