Select the
3D Angle Constraint tool (Drawing > Constraints > 3D > 3D Angle).
Select the stationary element.
Select the face, edge, or vertex of the selected element. Reset if
a face or entity is behind another face (or entity) until the desired one is
selected.
Select the second or movable element.
Select the face, edge, or vertex of the selected element.
Enter a data point to accept the constraint.
Applying a 3D
angle constraint between two elements.
