Mathematics is a good friend of our pupils. Some students think that mathematics is taught in class and can't be seen in life. Then you are wrong. Mathematics is everywhere. As long as you are a conscientious person in life, you will surely find that everyone knows what mathematics is on the map. In fact, it is the line segment scale.

With the line ruler, you can even see the world at a glance. On a globe with a diameter of 18.7 cm, the scale used is1:70 million. This globe looks only 1 cm2, but the actual area is 700 square meters. An unremarkable line segment on the globe-equator, its length is 4 1 102.6 km.

You see, the mathematics on the map is so useful that it really plays an irreplaceable role in our life.