Design of equidistant curves based on pentagons

Based on geometrical property of equidistant curves,the paper expounds and proved the design principles,drawing methods of the equidistant curves based on fundamental pentagons. It studies the changes of side length and the shape of fundamental pentagons,which made the effects on equidistant curves. It discusses the scope of design and its characteristics. Thus the design methods of the equidistant curves in the linking profiles are greatly improved.