三角形中的角（6岁以上）
Angles in triangles (age 6+)
区分图形的定义属性（如三角形是封闭的、有三条边）与非定义属性（如颜色、方向、整体大小）。
Distinguish defining attributes of shapes (e.g. triangles are closed and three-sided) from non-defining attributes (e.g. colour, orientation, overall size)
学习证据 / Evidence
- 构建和绘制具有定义属性的图形
- 能识别出无论图形的大小、颜色或方向如何变化，它仍然是三角形
- 能根据定义属性解释某个图形为什么是或不是某一特定图形
- Build and draw shapes that possess defining attributes
- Identify that a shape remains a triangle regardless of its size, colour, or orientation
- Explain why a given shape is or is not a particular type based on its defining properties
评估问题 / Assessment
{{name}}是否明白，一个形状是三角形的关键在于它有3条边和3个角，而不在于它的颜色或朝向？
Does {{name}} understand that what makes a shape a triangle is having 3 sides and 3 corners — not its colour or which way it's pointing?