The three sides in the book correspond equally, giving a hint that these three sides must correspond. For example, the triangle ABC is a right triangle, the angle C is 90 degrees, and the three sides are 3, 4 and 5. You draw like this, A is on the top, C is on the left, B is on the right, AC 3, BC 4, AB 5. Triangle A 1B 1C 1 is also a right triangle. The figure is the same as the above figure, but the length is changed, 6,8, 10. By contrast, AB corresponds to A 1B 1, and the corresponding other sides also correspond.

Maybe Lz saw this and thought I was lying to you. Look at this. The next example proves this problem.

Draw two different triangles, one ABC and the other A 1B 1C 1. In the triangle ABC, AB=3, BC=4, AC=2, A 1b 1, A 1b68. C 1A 1=6, which seems to correspond, 3 to 6=4 to 8=2 to 4, and three sides are in a column, but they don't correspond, which is why the three sides must correspond and don't correspond, which is wrong.

Mathematics is a rigorous subject, which can be taught to us. Naturally, after numerous arguments, I felt that it was really no problem to take over. Don't worry, at least I didn't find it in junior high school for three years. At most, I made up a verbal calculation and made a cross multiplication. Lz can take a closer look at those definitions, many of which are wrong. It is very helpful for your study if you don't add those words. I had this problem before, but.

Next time I meet you, Lz will try and draw a picture. Graphics are the most intuitive.

If you have any questions, please keep asking questions.