| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] at right angles | 23 |
|
| 2 | be at right angles | 23 |
|
| 3 | are at [adj] angles | 10 |
|
| 4 | [am/are] at right angles | 10 |
|
| 5 | are at [adj] angles | 10 |
|
| 6 | are at right [noun pl] | 9 |
|
| 7 | are at right [noun] | 9 |
|
| 8 | are [prep] right angles | 9 |
|
| 9 | are at right angle | 9 |
|
| 10 | are [prep] right angles | 9 |
|
| 11 | are at right angles | 9 |
|
| 12 | are at right angles | 9 |
|
