Students need to get from one chosen point to another. Possible moves are chosen by a spinner (https://www.flippity.net/rp.asp?k=1d0uILXoBBuLcLbf-DJfTyl7E8t1yLOXk4iuVYq8HKgU)
Students must justify how they know they can make such a move by clearly stating theorems of parallel and perpendicular lines.