Editing Solids and Surfaces - Autodesk AutoCAD 2013 Practical 3D Drafting and Design - page 205

• 3point : The cutting plane is defined by three non-linear points to be spe-
cified.
• Both : When prompting for a point that specifies the part to maintain, this
option allows maintaining both parts side-by-side.
Exercise 7.3
We are cutting the summit of the cathedral.
1. Open the drawing A3D_07_03.DWG .
2. Zooming in to the sphere, apply the SLICE command to it, specifying an
XY cutting plane that passes through its center. Define a point above the
plan to maintain the top hemisphere.