什么是 vertex?The highest point; the apex or summit: the vertex of a mountain. Anatomy The highest point of the skull.Anatomy The top of the head.Astronomy The highest point reached in the apparent motion of a celestial body.Mathematics The point at which the sides of an angle intersect.Mathematics The point on a triangle or pyramid opposite to and farthest away from its base.Mathematics A point on a polyhedron common to three or more sides.