They would be two right triangular pyramids.
A tetrahedron (a pyramid with a triangular base).
An internal angle of the polygon.
it is formed when 4 corries are formed round each side therefore making a pyramid shape of the mountain
An angle is the shape formed by two rays, called the arms of the angle, meeting at a common endpoint, called its vertex.
They would be two right triangular pyramids.
A tetrahedron (a pyramid with a triangular base).
An internal angle of the polygon.
The resulting shape when a solid is sliced in a particular direction is called a cross-section. It represents the intersection of the solid with the slicing plane. Cross-sections can vary depending on the orientation and angle of the cut.
it is formed when 4 corries are formed round each side therefore making a pyramid shape of the mountain
A 3-d shape with 12 faces is a dodecahedron. It can come in may configurations: A pyramid with a hendecagon (11 -sided) base, A decagonal prism, A hexagonal dirpyamid, A shape formed from penatgons, A cuboid with six of its vertices sliced off, and so on. So the answers to the remainder of the question depend on which shape precisely.
An angle is the shape formed by two rays, called the arms of the angle, meeting at a common endpoint, called its vertex.
A regular tetrahedron (an equilateral triangular pyramid).
The exterior angle formed by the letter "V". Notice how this shape is commonly used; for example the wings on a stealth bomber or an arrowhead have this shape.
a pyramid is a 3D shape :)
It could be a pyramid shape
The size of the angle would depend on the shape and number of sides the polygon has. It is called the exterior angle.