Question

what is angle and vertex
some examples ​

Answer 1

In geometry, a vertex is an angle associated with a vertex of an n-dimensional polytope. In two dimensions it refers to the angle formed by two intersecting lines, such as at a "corner" of a polygon.

Answer 2

⇰What is angle?

• ↬an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

⇰What is vertex?

• ↬A vertex is a point where two or more curves, lines, or edges meet.