This question has options. How would someone go about accomplishing this goal?
How to build a corner desk for a room?

pick from the following.
(a). Find the corner of the room and place two tables or flat tops against each other, at the corner, so they meet to form a triangular shape in the corner, then secure the tops.
(b). Find the center of the room and place two tables or flat tops against each other, side by side, so they meet to form a square shape in the middle, then secure the tops.
(a).