度与转角
Degrees and turns
知道角度是用度来衡量的，1度等于一整圈旋转的1/360；理解一个角旋转经过n个1度的角，它的角度就是n度。
Know that angles are measured in degrees, where one degree is 1/360 of a full turn; understand that an angle turning through n one-degree angles has a measure of n degrees
学习证据 / Evidence
- 说明完整的一圈是360度，直角是90度。
- 描述“1度”表示一个圆的几分之一。
- 说明一个45度的角经过了45个1度的角。
- Explain that a full turn is 360° and a right angle is 90°
- Describe what 'one degree' means in terms of a fraction of a circle
- State that an angle of 45° has turned through 45 one-degree angles
评估问题 / Assessment
如果{{name}}知道一个完整的圆是360度，能告诉您四分之一转是多少度，并大致说明1度看起来像什么吗？
If {{name}} knows a full circle is 360 degrees, can they tell you how many degrees a quarter turn is — and explain roughly what one single degree looks like?