A pyramid (3D)!
Some examples:
- triangular base pyramid
- square base pyramid
- rectangular base pyramid
- cone
The base of a square pyramid is the only face that is a square - all the others are triangular in shape. So you do not need any measurements to determine which is the base.
You find the length and height of the shape, them you find the volume
square
a house shape: a floor, 2 parallel walls and an angled roof
A dodecagon is a two-dimensional shape and so has only one face.
a sphere
sphere
a pyramid as long as there is only one base more specifically a rectangular pyramid
A 3D shape with one base and three faces can only have triangular faces.
The answer depends on the shape of the base: the appropriate formula will vary from one shape to another.
A cone.
A sphere has no base, and since it has no base, it has only a surface area and no lateral area.
A sphere has no base, and since it has no base, it has only a surface area and no lateral area.
A cone has one vertex, one edge, and one base.
In geometry, the only shape that has one surface is a plane.
It is the base/face of a certain shape, as in a square, it would be the bottom line(the one on/closest to the ground).
A cone