Triangle?

Geometry Level 2

If A,BA,B and CC denotes the angles of a triangle such that sin(A2)sin(B2)sin(C2)=18 \sin \left( \dfrac A2\right)\sin \left( \dfrac B2\right)\sin \left( \dfrac C2\right) = \dfrac18, then triangle ABCABC is a/an __________\text{\_\_\_\_\_\_\_\_\_\_} triangle.

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