A base is just the "bottom" of a shape. Shapes are in three dimensional shape, so if they are rotated around, it can sometimes be hard to say exactly what the base is.
For example, the base of a triangle can be ANY one of the three sides.
It's best to pick a base which is perpendicular (i.e., forms a 90 degree angle) with the height. Otherwise, you'll have to use more trigonometry to solve simple equations like, Area = (1/2) b x h
Their base shape. For example a rectangular prism has base that is a rectangle. Guess what kind of base shape a triangular prism has? yes, triangle.
Its a Pentagon.
If it is a pyramid, then the base shape is a SQURE. If it is a tetrahedron, then the base shape is a triangle.
The answer depends on the shape of the base: the appropriate formula will vary from one shape to another.
It is normally rectangular in shape.
the shape of the base of a rectangular pyramid is a rectangle.
The bottom line of a shape is the base of the shape. For example, the bottom line of a pyramid is the base of the pyramid.
The shape of each base of a cylinder is circle. Also, the base of it can be a pair of congruent or parallel.
Their base shape. For example a rectangular prism has base that is a rectangle. Guess what kind of base shape a triangular prism has? yes, triangle.
it is the shape of a star
Its a Pentagon.
If it is a pyramid, then the base shape is a SQURE. If it is a tetrahedron, then the base shape is a triangle.
The base of a cuboid is a rectangle.
The bottom or (Base) of a shape. Example...
A rhombus has no base. It is flat.
The hexagon is the base.
You find the length and height of the shape, them you find the volume