角度是两个相交线或表面之间旋转的度量。它以程度（°）或弧度（rad）为单位进行测量。
1 TEC = 3 OEC
1 OEC = 0.333 TEC
例子:
将15 三个第八个圈转换为一个八个圈：
15 TEC = 45 OEC
| 三个第八个圈 | 一个八个圈 |
|---|---|
| 0.01 TEC | 0.03 OEC |
| 0.1 TEC | 0.3 OEC |
| 1 TEC | 3 OEC |
| 2 TEC | 6 OEC |
| 3 TEC | 9 OEC |
| 5 TEC | 15 OEC |
| 10 TEC | 30 OEC |
| 20 TEC | 60 OEC |
| 30 TEC | 90 OEC |
| 40 TEC | 120 OEC |
| 50 TEC | 150 OEC |
| 60 TEC | 180 OEC |
| 70 TEC | 210 OEC |
| 80 TEC | 240 OEC |
| 90 TEC | 270 OEC |
| 100 TEC | 300 OEC |
| 250 TEC | 750 OEC |
| 500 TEC | 1,500 OEC |
| 750 TEC | 2,250 OEC |
| 1000 TEC | 3,000 OEC |
| 10000 TEC | 30,000 OEC |
| 100000 TEC | 300,000 OEC |
规则