The vertical plane through the vertex point is a triangular shape.
What is a cross-section?
The cross-section is a plane figure obtained by the intersection of a solid with a plane. It is a very thin slice of that solid and can be cut in any shape.
How do you solve the given question?
For the given pyramid, when it is cut by the plane containing its altitude and perpendicular to its base, is a vertical plane through the vertex point of the pyramid. The vertical planes are perpendicular to the base.
So, the type of cross-section is a vertical plane through the vertex point in a triangle shape.
Learn more about planes to solid figures at
https://brainly.com/question/21465568
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