1. On the map of 1:2000 scale, the distance between AB and ab is 5cm. What is the actual distance between AB and ab 2. Now there are three numbers: Please add another number to make the four numbers proportional. What is the number to be filled in? 3. The perimeter ratio of two similar triangles is 2: what is the area ratio?

1. On the map of 1:2000 scale, the distance between AB and ab is 5cm. What is the actual distance between AB and ab 2. Now there are three numbers: Please add another number to make the four numbers proportional. What is the number to be filled in? 3. The perimeter ratio of two similar triangles is 2: what is the area ratio?

It's 5 / 2000 / 100 = 100 meters