help. ummm. just... like.. the.. question..

Answer:
Triangular prism
Step-by-step explanation:
When the cube given in the figure is cut into two pieces by a single slice that passes through points A, B and C, the resulting solid will be a triangular prism as it will have two congruent triangular bases.
The image I posted is of a triangular prism which will be formed after cutting the cube as stated in the question.