Question

A prism whose base is a 9-sided polygon is intersected by a plane. In which case could the cross section be a 10-sided polygon?


when the plane is parallel to the base of the prism



when the plane is perpendicular to the base and contains two edges of the prism



when the plane is perpendicular to the base and contains one edge of the prism



when the plane makes a narrow angle with the base

Answer 1

when the plane is perpendicular to the base and contains two edges of the prism i think