If we're talking in purely geometric terms:
If the edges of a prism/cylinder make a right angle with the base, it is called a right prism/cylinder. If not, it is an oblique prism/cylinder...it will look as if it were slanting to one side instead of standing straight.
Similarly, if the top vertex of a pyramid/cone is directly above the center of the base, it is a right pyramid/cone. Otherwise, it is an oblique pyramid/cone. Again, it will look a bit askew.
It is a line segment.
If the angle from the base to the highest point is a right angle, it is right. If not, it is oblique.
Rectangular is an adjective, not a noun. So the answer depends on a rectangular WHAT! An oblique rectangular cone need have no line of symmetry.
Slanting. A slash (/) is oblique
oblique rectangular
It is a shape that is not regular.
It is a line segment.
it is an oblique straight oval.
If the angle from the base to the highest point is a right angle, it is right. If not, it is oblique.
Oblique drawings are designed to show a three dimensional view of an object. It is a kind of a drawing that shows one face of the object in true shape, but the other faces on a distorted angle. Oblique is not really a '3D' system but a 2 dimensional view of an object with 'forced depth'.
internal oblique opposes the external oblique
Rectangular is an adjective, not a noun. So the answer depends on a rectangular WHAT! An oblique rectangular cone need have no line of symmetry.
Oblique lines:
Oblique means at an angle.
Slanting. A slash (/) is oblique
oblique rectangular
Oblique means slanted or at an angle.