t is a simple shape that is the set of all points in a plane that are at a given distance from a given point, the center.

It is a polygon with three edges and three vertices.

It is any quadrilateral with four right angles.

It is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex.

It is a perfectly round geometrical and circular object in three-dimensional space that resembles the shape of a completely round ball.

It is a solid geometric figure whose two ends are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.

It is a three-dimensional solid object that tapers smoothly from flat base to a point called the apex or vertex.

It is a convex quadrilateral with at least one pair of parallel sides.