A cone has one vertex and one edge.
A circle. A Moebus strip.
They are the corners of any quadrilaterals but in a shape of a rough surface that has a pointy edge that can also be a fourth angle.
A cone.
A cone perhaps
A line?
sphere
The shape with just one surface is.... a sphere.
A cone has one vertex and one edge.
In geometry, the only shape that has one surface is a plane.
triangle
A cone has one vertex, one edge, and one base.
a sphere
There is no solid that has those characteristics. To have an edge it must have another surface.
A circle?
A cone.
determine the length of one edge of a cube that has a surface area of 864 square inches.