Girls in Math at Yale 2023 Tiebreaker 2 - bee travels in 3D
Source:
October 7, 2023
combinatoricsgeometry
Problem Statement
A bee travels in a series of steps of length : north, west, north, west, up, south, east, south, east, down. (The bee can move in three dimensions, so north is distinct from up.) There exists a plane that passes through the midpoints of each step. Suppose we orthogonally project the bee’s path onto the plane , and let be the area of the resulting figure. What is ?