Why junior high school mathematics is so much more difficult than senior high school mathematics. High school mathematics can be deduced as long as it is understood. Some formulas in junior high school mathematics are to be memorized. There are many formulas defined in junior high school, including rectangular area formula and prism volume formula, which you can't deduce.

However, the formula of high school, or high school mathematics itself, is a further deepening of elementary mathematics and a preliminary step towards higher mathematics. It aims to cultivate your meticulous logic, so there will be many things that you need to deduce strictly based on the definition theorem, so you think it can be deduced.