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

3 answers

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.
triangle
its a trapezoid.