Use the context menu command New Sketch [New sketch...]... to open the Sketcher and create a circle [Circle] (as well as a rotation axis [Rotation axis] ) that is positioned so that it later rotates and penetrates the 3D body.

Note A rotation axis [Rotation axis] is a prerequisite for the rotation of the 2D sketch. If this has not yet been defined in the Sketcher, the following error message appears when the Rotate. [Rotate...].. command, the following error message appears. Rotation not possible because of missing center line. The rotation axis [Rotation axis] is shown as a dashed line in the 3D view of the sketch.

In the 3D history [3D History] under Sketch 2, select the context menu command Section [Cut] -> Rotate.... [Rotate...]

-> The Rotating body [Rotational solid] dialog box opens.

Do you want the extrusion to go through the entire body or simply through a certain angle?

Make the appropriate settings in the Rotating body [Rotational solid] window. You can immediately see the expected result in the 3D view.

In the example, the cuboid is to be completely penetrated, i.e. it is rotated in both directions [Both directions] at the required angle [Angle] (here 90°).

-> After confirming with OK , both objects are cut. A ring-shaped tube is subtracted from the cuboid.

-> Another item (feature) appears in the 3D history [3D History]: Cut extrude 1.