If \(\angle A\), \(\angle B\) and \(\angle C\) are the three angles of the triangle \(ABC\), then categorise its characteristic based on its type.
| Type of triangle | \(\angle A\) | \(\angle B\) | \(\angle C\) |
| Acute angled triangle | \(< 90°\) | ||
| Right angled triangle | \(< 90°\) | \(< 90°\) | |
| Obtuse angled triangle | \(< 90°\) |