The first floor of the Buttercup has both inside and outside corners.
Most interior rooms are rectangular and are square. Most of the cuts will be for inside corners at 45 degrees. Some rooms like the first floor of the Buttercup will have outside corners.
Bay windows are usually all inside corner cuts; however, the angles will not be 45 degrees for hexagon shapes. If cutting moulding for an exterior of a house, window cornices, bookcases and fireplaces most of the cuts will be for outside corners.