An equilateral triangle ABC is sliding along the floor. At a certain moment, the velocity of point A is directed along AB and has a magnitude v, while the velocity of point B is directed along BC. What is the speed of point C at that moment?
The 2017-2018 season of Challenges had a great finish, with many readers from all over the world submitting their solutions to our March, April and May problems.
We are pleased to recognize the following contributors:
Juan M. Aguirregabiria (University of the Basque Country, Spain)
Jeysthur Ang (Shuqun Secondary School, Singapore)
Salvatore Basile (Università degli Studi di Palermo, Palermo, Italy)
Vincent Bresson (CPGE TPC, Mulhouse, France)
Phil Cahill (The SI Organization, Inc., Rosemont, PA)
Zhiwei Chong (Sanxin Bilingual School, Guangdong Province, China)
Norman Derby (Southwestern Oregon Community College, Brookings, OR)
Alan J. DeWeerd (University of Redlands, Redlands, CA)
W.P. Dykshoorn (Bayview Secondary School,...
