面积 Area
教学指引
以下示范如何以 ARGEO Portable 教导面积单元。
The following demonstration shows the teaching procedures of Area by using ARGEO Portable.
计算规则形状物件的实际面积 Calculate the actual area of regular-shape object.
选择一个「预设地形(Preset Terrain) 」或使用「地形塑造 」功能建设一个地形,以下以在「地图Map B」计算E塘的实际面积为例子。
Select a“Preset Terrain ”or use“Terrain Modifying ”function to form a terrain. The following example is to calculate the actual area of Pond E in “地图Map B Preset Terrain”
计算实际面积。
Calculate the actual area.
计算不规则形状物件的实际面积 Calculate the actual area of irregular-shape object.
选择一个「预设地形(Preset Terrain) 」或使用「地形塑造 」功能建设一个地形,以下以在「地图Map B」计算格网方格5286、5287、5386及5387中深啡色山体的部份的实际面积为例子。
Select a “Preset Terrain ” or use “Terrain Modifying ” function to form a terrain. The following example is to calculate the actual area of hill, which in dark brown colour in grid squares 5286, 5287, 5386, and 5387.
*不建议使用白色绘画,因在随后的步骤会难以计算面积。
*可按「放大」和「缩小」以调整地图介面,减小误差。
Select “Drawing Tools ” and sketch the outline of the area which needs to be measured.
*White colour is NOT suggested to use in sketching as it will be difficult to calculate the area in the following steps.
*“Enlarge” and “Reduce” can be applied to adjust the “Map view” to reduce the error.
-
Apply “Environment Option ” and select the terrain material in black and white (missing signal logo).
按「呼唤直尺 |ruler|」。
把直尺上的方格覆盖在物件上。
*应把直尺调校至取得最多的完整方格。
Cover the grids on the object.
*Try to get as more complete squares as possible, when adjusting the ruler.
数点完整方格及不完整方格的数目。
*红色数字为完整方格、蓝色数字为不完整方格。
Count the number of complete and incomplete squares.
*The red numbers are the complete squares, while the blue numbers are the incomplete squares.
计算总格数。
Calculate the total number of squares.
计算实际面积。
Calculate the actual area.
下载教学资源
教学指引 按此下载
工作纸及答案(中文版) 按此下载
工作纸及答案(英文版) 按此下载