The slicing is done perpendicular to the base.
Cross-sectional area of a prism
From the sliced prism, we can see that the slicing is done perpendicular to the base of the prism.
This sliced prism caused us to obtain the triangular cross-section on this cake. On the other hand, if the slice that created the triangular cross-section on this cake is created in a parallel manner, we would have obtained a rectangle.
Hence, the slicing is done perpendicular to the base.
Learn more on cross-section of prism here: https://brainly.com/question/8829615
