A square-based pyramid has a square as the base with each side having a triangle connected to it. The correct option is B.
What is a Square pyramid?
Take a Square. This is the base. Now take 4 triangles such that each of them is connected to the one-one side of the base square and when they're taken together, they form a closed object. That shape is called a square-based pyramid.
Given that a square pyramid is sliced so that the cross-section is perpendicular to its base. The cross-section intersects the vertex of the pyramid.
After the intersection, the cross-section of the pyramid will look like a triangle. This can be observed in the image given below.
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