角的类型
Types of angles
辨认锐角和钝角；会比较并按大小排列不超过两个直角的角。
Identify acute and obtuse angles; compare and order angles up to two right angles by size
学习证据 / Evidence
- 把给定的角归类为锐角、直角或钝角。
- 通过目测比较，将四个角按从小到大排列。
- 找出给定三角形或四边形中的所有锐角和钝角。
- Classify given angles as acute, right, or obtuse
- Order four angles from smallest to largest by visual comparison
- Identify all acute and obtuse angles in a given triangle or quadrilateral
评估问题 / Assessment
如果{{name}}看着钟面上显示不同时间时的时针和分针，能说出这两个表针形成的角中哪个是锐角（比直角更尖），哪个是钝角（比直角更宽）吗？
If {{name}} looks at the hands on a clock showing different times, can they tell you which angle between the hands is acute (sharper than a right angle) and which is obtuse (wider)?