平面图形（8岁以上）
2-D shapes (age 8+)
识别不同朝向的平面图形中的对称轴；认识轴对称图形，并能画出它们的对称轴。
Identify lines of symmetry in 2-D shapes presented in different orientations; recognise line-symmetric figures and draw lines of symmetry
学习证据 / Evidence
- 找出长方形、正方形和等边三角形的所有对称轴
- 判断给定图形在旋转后是否仍具有对称轴
- 辨认一组图形中哪些图形恰好只有一条对称轴
- 确定正六边形有几条对称轴
- 画出给定图形的所有对称轴
- 辨认一组图形中哪些不是轴对称图形
- Find all lines of symmetry in a rectangle, square, and equilateral triangle
- Determine whether a given shape has a line of symmetry when rotated
- Identify which shapes in a set have exactly one line of symmetry
- Determine how many lines of symmetry a regular hexagon has
- Draw all lines of symmetry for a given figure
- Identify which figures from a set are not line-symmetric
评估问题 / Assessment
如果给{{name}}一张蝴蝶或星星的图片，{{name}}能画出那条（或几条）对折线，使图形沿它对折后两边完全重合吗？
If {{name}} is given a picture of a butterfly or a star shape, can they draw the line (or lines) where you could fold it exactly in half so both sides match?