The diagonal dilemma

On two faces of a cube a diagonal is drawn that meet in the same vertex. What’s the angle between them?

Scroll down for a solution to this problem.


The angle is 60°.

Draw the diagonal connecting the non-common vertices as shown. Since all three diagonals have equal length, they form an equilateral triangle, of which all three angles are 60°.

🤞 Don’t miss these puzzles!

Subscribe to the weekly geometry puzzle e-mail.

Leave a Reply

Your email address will not be published. Required fields are marked *

Optionally add an image (JPEG only)