There are very many possible answers: some of the more common shapes are:
Closed curve, such as a circle, ellipse.
It is an angle.
An angle.
An angle is a figure made up of two noncollinear rays with a common endpoint. The common endpoint is called the vertex, while the two noncollinear rays are called the sides of the angle.
angle
an angle.
an 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.
angle
An angle is the union of two rays with a common endpoint.