Geometry

This is an octagon. it is called this, because it has eight sides, points, and vertices. This is a hexagon. It is called this, because it has 6 sides, points, and vertices. This is a Pentagon. It is called this, because it has 5 points, vertices, and sides. This is a square. It is called this, because it has 4 sides, points, and vertices. In 3D it has 6 faces. This is a triangle. It is called this, because it has 4 sides, points, and vertices. In 3D if it has 4 sides, it has 5 faces, including the bottom.