Cross section of a Cube90 Degree Vertical & Horizontal cross sections of a Cube are square. Brahmajyothi
No, a cube cannot have an octagonal cross-section.
The vertical cross section of a right vertical cone is a triangle if that cross section is taken from the vertex. Any other vertical cross section will reveal a hyperbola (with endpoints on the base of the cone). A link can be found below.
It is a rectangle.
Yes it can.