Sketchup -- How to Draw Lines Tangent to a Circle By WorkshopAddict in DesignDigital Graphics9,935193Introduction: Sketchup -- How to Draw Lines Tangent to a CircleBy WorkshopAddictFollowMore by the author: Sketchup doesn't have a function that allows you to draw tangent lines to a circle so you have to do it the old school geometry way. Here is how.