Do Triangles Have Four Sides? #shorts

🔺 #shirt #shorts 🔺 join our brain food club to get it! In this short, we say hello to the “Sherman line“ -- a feature of all triangles that made B.F. Sherman say, “what else was there to call [it] but the fourth side of the triangle?” Check out this interactive version @amazinglybland on twitter made! Sherman’s original paper: