Geometric dilation (size change, typically expansion) does not change the shape of a figure, or its center location, only the size.
L shape
A circle does not have a vertex.
a vertex
A diagonal in a shape is a straight line from one vertex to another vertex (corner).
None. The vertices, the scale factor as well as the centre of dilation can each be defined independently of the other two. Each different combination will result in a different image.
A chevron. Basically, any polygon with an acute angle whose vertex points to the center of the shape.
it is a vertex
A vertex is when 2 edges meet and make a curved line.
Nothing. Vertices is the plural term from vertex. A vertex is a point where two or more lines meet. They usually terminate (end) there but don't have to. In a 2- or 3-dimensional shape a vertex is a corner.
I do not believe that there is such a shape.
is it a vertex