In life, we can find a lot of mathematical knowledge. Such as triangle, tree planting, location and direction, etc. As long as we observe carefully and think more. Now let me tell you about triangles in detail.

This Tuesday, my father took me to play basketball downstairs in the dormitory. Dad asked me, "Do you know what shape the basketball stand is? How did the triangle come from? " I replied that the basketball bracket is triangular, and I don't know how the triangle came from. Dad said, "A triangle is a closed figure consisting of three line segments connected end to end. It's called a triangle. The figure surrounded by three straight lines is called a plane triangle. " I nodded knowingly.

On Wednesday, I will go back to Guangzhou. At the airport, I saw a place selling wood products. I saw some things with triangles, such as the eaves of small houses, tripods of bicycles, and ancient camera brackets. But the price tag is too expensive for me to buy. But seeing these little things, I have another question in my heart. Why do they all have triangles? Oh, this is a stable triangle. Triangles make them stronger. Out of the airport, I found the triangle again. That's a little hat folded by a girl. I sat in my father's car and thought about what I learned that day over and over again. I felt very happy. ?

? Tell me, am I an observant person? As long as you observe carefully and think more. Mathematics is so simple, you can also learn a lot of knowledge!