Combine Shapes To Create Custom Shape. One option is to insert shapes but if you cant find the exact shape you need you can create your own. Subtract shapes with the SUBTRACT command.
Be careful however to not over use shapes. Sometimes you need to create a 2D profile that is a combination of the basic geometrical shapes that AutoCAD creates. Join David Rivers for an in-depth discussion in this video Merging shapes to create a custom shape part of PowerPoint 2013.
Once you have added custom shapes to the drawing canvas you can drag and drop them onto the scratchpad or a custom shape library.
Finally you can use the INTERSECT command to find the intersection of 2 regions as you see here. Union Combine Subtract or Intersect. Place a copy of the ice cream image on the same slide as the new custom shape. While you might be able to use the PLINE command to create what you want in some cases 2 other methods may be easier.