Sketch Relations in 3D Sketches Many relations available in 2D sketches are available in 3D sketches. Additional sketch relations supported with 3D sketching include:Perpendicular relations between a line through a point on a surface. Relations between 3D sketch entities created on one sketch plane, and 3D entities created on other sketch planes. Symmetric relations about a line between 3D sketches created on the same plane. No relations applied Symmetric relations applied Relations with spline handles such as along an axis or between handles. Relation along X axis highlighted Midpoint relations. Equal relations. Tangent or equal curvature relations between faces and splines. Relations between arcs and other sketch entities. Relations between arcs such as concentric, tangent, or equal. Normal to applied between a line and a plane, or between two points and a plane. In a 3D sketch, you can sketch entities along global X, global Y, or global Z axis. Arc with perpendicular line created on perpendicular planes Arc with tangent line and perpendicular line to the midpoint between entities Equal arcs created on perpendicular planes Concentric and perpendicular relations between a cone and a 3D sketch line. Conical entity and 3D line sketch Concentric relation between entities Perpendicular relation between entities Parent topic3D Sketching Related concepts Tangent to Face Relations with Splines 3D Sketching Tools