There are very many possible answers: some of the more common shapes are:
A two-dimensional figure that has one endpoint is a ray. A ray starts at a single point, called the endpoint, and extends infinitely in one direction. It is defined by its endpoint and another point that indicates the direction.
An angle.
It is an angle.
A figure that is made up of two noncollinear rays with a common endpoint is an angle. The angle that is formed can be acute, right, obtuse or reflex.
The geometric figure formed by two rays with a common endpoint is called an angle. The common endpoint is known as the vertex of the angle, while the rays are referred to as the sides of the angle. Angles are typically measured in degrees or radians.
an angle.
an angle
angle
an Angle
An angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle.
The meeting points of two rays is called a vertex
One possibility is a closed shape: a circle, ellipse, a closed wriggly shape.