平面图形（6岁以上）
2-D shapes (age 6+)
识别和描述平面图形的特征，包括边数和垂直对称轴。
Identify and describe properties of 2-D shapes including the number of sides and line symmetry in a vertical line
学习证据 / Evidence
- 数出给定平面图形的边数
- 判断一个平面图形是否有垂直对称轴
- 利用边数和对称性等特征来描述和区分平面图形
- Count the number of sides of a given 2-D shape
- Identify whether a 2-D shape has a vertical line of symmetry
- Use properties (number of sides, symmetry) to describe and distinguish between shapes
评估问题 / Assessment
{{name}} 能否数出一个图形的边数，并说出它是否有对称轴？例如，知道长方形是对称的，而不等边三角形则不是。
Can {{name}} count the sides of a shape and say whether it has a line of symmetry — for example, knowing that a rectangle is symmetrical but a scalene triangle is not?