Question

question
select the type of cross section formed when a triangular pyramid is cut by a plane containing its altitude and perpendicular to its base.
answer
hcxagon
triangle
pentagon
rectangle

Explanation:

When a triangular pyramid is cut by a plane containing its altitude and perpendicular to its base, the cross - section formed is a triangle. This is because the plane intersects three of the pyramid's faces (the base is excluded as the plane is perpendicular to it, but the three lateral faces are intersected), and the intersection of a plane with three non - parallel planes (the lateral faces of the pyramid) forms a triangle.

Answer:

triangle