Junior high school students can look at geometric elements. It is ok to broaden your horizons, but some chapters are completely beyond the scope of junior high school.

Introduction:

Elements of geometry (Greek: σ τ ο ι τ ε? α) is also called "original". It is a mathematical work written by Euclid, an ancient Greek mathematician. It is the foundation of European mathematics, summarizes five postulates of plane geometry, and is widely regarded as the most successful textbook in history. Euclid also wrote some works about perspective, conic curve, spherical geometry and number theory. Euclid used the axiomatic method. This method later became a model of establishing any knowledge system, and in almost two thousand years, it was regarded as a model of rigorous thinking that must be followed. This book is the basis of Euclid's geometry and the most widely circulated book in the west after the Bible.