The three dimensions of ballet space are

They are one degree: ground, two degrees: standing, and three degrees: air.

Ballet is to use music and dance skills to perform dramatic plots. Ballet art was conceived in Italy and was born in the court of Louis XIV of France in the late17th century.18th century was becoming more and more perfect in France, and19th century entered the most prosperous era in Russia. In the long historical growth process of nearly 400 years, ballet has a great influence and spread widely, and has become an art form that all countries in the world are fully growing. Actresses often dance on tiptoe.