Abstract shape can be described as what it is not. Confused? Well any shape it doesnot resemble anything commonly we recognize, but is not a simplified version of some object we recognize.
Natural drawing of Rose
Abstract drawing of a Rose
It is not a simplified version of some object we know or recognize. It cannot be measured with instruments or reproduced by measuring the lines, angles or radius. Abstract shapes are free-form. They may be formed with straight and curved lines, or any combination of straight and curved lines.
To be make it more simple Draw any line or shapes and describe it by saying, it isn’t anything, its just a design. It is what we call an abstract design.
Image sources: Various sources form google images