This is from the UKMT Senior Challenge of 2004.
“L, M, and N are midpoints of a skeleton cube, as shown. What is the value of angle LMN?
_____A_90°_____B_105°_____C_120°_____D_135°_____E_150°”
See Cube Slice Angle Problem for solutions.
Meditations on Mathematics
A compendium of puzzles, problems, math inquiries, and math commentary.
