Math Round 4

We learned three textbooks at the same time because of our facilitator, Sam thinks that they all have the same lesson, but they get more advance at each level. Those three textbooks are 5B, 6A, and 6B. One of the lessons this round is angle. I don’t think I’m good at angle anyway.  In addition, I was on a trip the whole week, while my other classmates learn about angle. On 1st April, I came up to class and there’s a practice exercise on the board. I paused because I don’t know how to solve that problem. Later my friend asked me if I want some help. With my friend help, I could solve it. This was the first time that I was not able to solve a math problem in math class. The reason was that I don’t know the secret of angle, and I want to tell you so then you would able to solve angle problems. The secret is, a triangle has three angles and the sum of those three angles equal to 180 degrees and quadrilateral has four angles and the sum of those four angles equal to 360 degrees. Later I could solve angle problems easily when I know those secret.