Adding Tangent Arcs Click Tangent Arc (Sketch toolbar), and add tangent arcs between each set of end points. Click Smart Dimension (Dimensions/Relations toolbar), and dimension one of the arcs to fully define the sketch. Click and then click File > Save to This PC. In the dialog box, in File name enter 3d_loft.SLDPRT, then click Save. Parent topic3D Sketching with Planes Previous topic Adding and Dimensioning a Line Next topic Using References