What is the name of the object that is being described?It's a closed five-sided 2D-shape, the sides of which are equal in length and joined at the same angle to each other.

Shapes have angles, faces and edges. Shapes can be two-dimensional (2D) or three-dimensional (3D). 2D shapes are flat, like triangles and squares and 3D shapes are solid, like cubes and pyramids. There are many different shapes.