比例尺与相似图形
Scale and similar shapes (age 11+)
运用比例尺理解和绘制比例图与地图，能够根据地图上的距离计算实际距离，也能把实际距离换算成地图上的距离。
Use scale factors to interpret and create scale diagrams and maps, calculating real-life distances from map measurements and vice versa
学习证据 / Evidence
- 使用给定的比例尺（例如1:25,000）根据地图上的测量结果计算实际距离
- 使用选定的比例尺绘制房间的比例图
- 在涉及不同单位的题目中换算地图距离与实际距离
- Calculate a real-life distance from a map measurement using a given scale (e.g. 1:25,000)
- Draw a scale diagram of a room using a chosen scale factor
- Convert between map distance and actual distance in problems involving different units
评估问题 / Assessment
如果{{name}}看一张地图，图上1厘米代表50公里，能否算出地图上相距4.5厘米的两座城市之间的实际距离？
If {{name}} looks at a map where 1 cm = 50 km, can they work out the real distance between two cities that are 4.5 cm apart on the map?