| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] be at right angles | 13 |
|
| 2 | [noun] be at right angle | 13 |
|
| 3 | [noun] be at right [noun pl] | 13 |
|
| 4 | [noun sg] be at right [noun] | 7 |
|
| 5 | [noun] are at right [noun] | 6 |
|
| 6 | [noun pl] be at right [noun] | 5 |
|
