三维图形上的二维平面
2-D faces on 3-D shapes
识别三维立体图形表面的二维形状（如圆柱体上的圆形、棱锥上的三角形）。
Identify 2-D shapes on the surface of 3-D shapes (e.g. a circle on a cylinder, a triangle on a pyramid)
学习证据 / Evidence
- 指出圆柱体或圆锥体上的圆形面
- 识别棱锥上的三角形面
- 认识到立体图形的面是二维图形
- Point out a circular face on a cylinder or cone
- Identify triangular faces on a pyramid
- Recognise that the faces of 3-D shapes are 2-D shapes
评估问题 / Assessment
{{name}}能否观察一个三维立体图形，并说出它各个面上的二维形状——例如，说圆柱体两端是圆形，侧面是一个长方形？
Can {{name}} look at a 3-D shape and name the 2-D shapes on its faces — for example, saying a cylinder has circles on the ends and a rectangle wrapped round the side?