Your model is more than just straight lines. SketchUp can help you create curved geometry using arcs. Before you begin drawing arcs, here are a few handy details about the way arc entities work:

Tip: Inserted SketchUp files can now contain Dashed Lines, to learn more about managing those new line types with inserted files, see Working with SketchUp Dashes in Imported ModelsWhether you want to draw the long arc of history or just a precise section of a circle, LayOut has four arc tools that enable you to draw an arc any way you like:

The LayOut interface contains the tools and features you need to create 2D documents and presentations from your 3D models. LayOut and SketchUp are made to work together. Many tools and features in LayOut work a lot like they do in SketchUp.Each part of the LayOut interface provides a different set of options to help you with your documents.