It could be solid but it need not be: for example, it could be a wriggly line drawn on the surface of a sphere.
Yes, in geometry, a solid is a three-dimensional figure that occupies space and has volume. Examples of solids include cubes, spheres, cylinders, and pyramids. These shapes have length, width, and height, allowing them to have physical presence in the three-dimensional space we experience in the real world.
A point
a rectangle
In a close figure it is the set of points inside the figure.
The geometry of similarity in the Euclidean plane or Euclidean space.
a figure that is used in geometry
Yes, in geometry, a solid is a three-dimensional figure that occupies space and has volume. Examples of solids include cubes, spheres, cylinders, and pyramids. These shapes have length, width, and height, allowing them to have physical presence in the three-dimensional space we experience in the real world.
A point
a rectangle
A point.
They can be any figure
In a close figure it is the set of points inside the figure.
A straight line is a one dimensional figure in geometry
The geometry of similarity in the Euclidean plane or Euclidean space.
The space within an object is its volume.
Geometry
According to geometry, a quadrangle is a figure having four angles and four sides.