Raked and Splayed Legs
Stools commonly have legs that are splayed in both directions: raked and splayed. Drawing legs at these compound angles in SketchUp can be a bit challenging but there’s a plugin called, of all things, Rake and Splay be Steve Baumgartner that does all the heavy lifting for you. Here’s a video showing how I use it. I’m using the legs from Christian Becksvoort’s Sturdy Stool for this example.
I left out what would normally be the next step after getting the legs into place and cleaning up the model. That is adjusting the component axes to align with the legs correctly so the bounding box fits tightly and represents the size of the blank from which you’d cut the legs.