Triangle?

Geometry Level 2

If \(A,B\) and \(C\) denotes the angles of a triangle such that \( \sin \left( \dfrac A2\right)\sin \left( \dfrac B2\right)\sin \left( \dfrac C2\right) = \dfrac18\), then triangle \(ABC\) is a/an \(\text{__________} \) triangle.