Answer:
Pyramid having triangular base.
Base Δ ACD
Faces Δ ABD, Δ BCD and Δ ABC.
Explanation:
Here in this problem, we are given a three-dimensional picture of a figure. We have to answer the name of the figure, the name of its bases and the faces.
Now, it is clear from the picture attached to this question that it is a pyramid with a triangular base.
The plane with the Δ ACD is its base.
The faces are Δ ABD, Δ BCD, and Δ ABC planes. (Answer)