Question

a plane intersects a square pyramid perpendicular to its base but not through a vertex.The plane forms a cross section what is the shape of the cross section
a)trapezoid
b)triangle
c)square
d)rectangle

Answer 1

planes that intersect only one of the edges are triangular.

Planes that contain two of the edges have quadrilateral cross-sections. If the plane is parallel to one of the base edges, the section is a trapezoid. Otherwise, it is just a general quadrilateral.

Try drawing some cases.

Answer 2

triangle

Answer 3

its a trapezoid.