No.
In geometry, a triangle is always found in a prism.
what two- dimensional figure results from slicing a right triangular prism with a plane perpendicular to its bases
rectangle
When the 3-d shape is a prism and the cross section is in a plane at right angles to the length of the prism.
There are many possibilities, and here are a couple: A dodecagonal prism (dodecagon = 12 sided plane figure); A heptagonal pyramid (heptagon = 7 sided plane figure).
A prism. A prism is named for its base, eg a triangular prism has a triangle for the base. If the base is a circle, the circular prism is called a cylinder.
The solid figure swept out by a polygon which moves in a constant direction not in the plane of the polygon. If the direction is perpendicular to the plane then it is a right prism.See related link for another definition.
I think its plane
plane figure
Yes, if it is a prism with an irregular base.
Rectangle prism
The answer depends mainly on the plane which is used to divide the prism.The result can be a rectangular prism (or a cube), a trapezoidal prism, a triangular prism, but to get really exotic shapes the cutting plane needs to be not parallel to any of the faces or diagonals of the prism.