Question

Given the intersection of a pyramid and a plane with a trapezoidal cross section.

Which option is true about the plane of intersection?

The pyramid is cut with a plane parallel to the base.
The pyramid is cut with a plane passing through the top vertex and perpendicular to the base.
The pyramid is cut with a plane perpendicular to the base, but not through the top vertex.
The pyramid is cut with a plane passing through the top vertex and not perpendicular to the base.Given the intersection of a pyramid and a plane with a trapezoidal cross section.

Which option is true about the plane of intersection?

The pyramid is cut with a plane parallel to the base.
The pyramid is cut with a plane passing through the top vertex and perpendicular to the base.
The pyramid is cut with a plane perpendicular to the base, but not through the top vertex.
The pyramid is cut with a plane passing through the top vertex and not perpendicular to the base.

Answer 1

simply go through the choices and see which cross-section leads to a trapezoid shape

for example, starting with choice 1 ---> The pyramid is cut with a plane parallel to the base. ---> not a trapezoid, since the cross-section will take the same shape as the base

repeat this with all other choices until you end up with a trapezoid-shaped cross section

if you're still stuck with the visualization part: https://dailprice.weebly.com/uploads/1/3/2/7/13279202/9886475_orig.gif