# GCTANGENT Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [G](Help%20System/GSTARCAD/2027/Commands/G/(G).md) ## Function Description: Constrain two curves to remain tangent to each other or their extension lines to remain tangent to each other。 ## Command Access: Icon： Menu Item: Parameters (P) > Geometric Constraints (G) > Tangent (T) Ribbon: Parameters > Geometric > Tangent Toolbar: / Command Line: GCTANGENT Command Alias：/ ## Command Prompts: ``` Select first object: Select the object that needs to be tangent. ``` ``` Select second object: Select the object that is to be tangent to the first object. ``` ## Operation Steps: 1、As shown in the figure, select circle and line to add tangent constraint; 2、The line is tangent to the circle.  --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_G/GCTANGENT.html) · © Gstarsoft Co., Ltd.