A triangle.
A pentagon
It is an 8 sided octagon
Well, you could always count them. Also, the number of sides is always equal to the number of vertices.
A quadrilateral has 4 sides. It has no vertices as a quadrilateral is a two dimensional shape. * * * * * A vertex is a point where two or more lines (edges) meet. There is no requirement for the figure to be three dimensional. So the correct answer is that is has 4 vertices.
Hexagon
A triangle.
A pentagon
It is a 6 sided hexagon
It is an 8 sided octagon
It is the 6 sided hexagon
All of the polygons except the triangle
If it is a 2-dimensional figure then it is a quadrilateral. If it is a 3-dimensional figure then it is a tetrahedron.
A geometric shape with 4 sides and 4 vertices is a 4-sided figure, a quadrilateral.
A hexagon is any two-dimensional polygon with six sides and six vertices. If it is a regular hexagon, then opposite sides are parallel and each of the angles equals 120 degrees. The six interior angles then add up to 720 degrees
A circle is the only geometric two dimensional shape that does not have any vertices, or points. However, there are non geomatric shapes that do not have any vertices. These are called organic shapes and are constructed either of only curved sides or curved sids and straight sides. Many three dimensional shapes do not have any vertices, the geometric ones include cylinders, spheres, and hemispheres.
Well, you could always count them. Also, the number of sides is always equal to the number of vertices.