Online registration is closed for this event. If available, tickets on the day of the event may incur an additional charge.

Every Triangle Is Equilateral

with Chaim Goodman-Strauss

Monday, September 12 at 5:30 pm ET (New York)


Your own eyes and plain common sense might mislead you, yet we present a proof that every triangle is equilateral, with three equal sides and three equal angles.  Will you see through it? 

This is a free, members-only event.  Not a member?  Join today!

Registration closes on September 12 at 12:00 noon ET (New York).

To fully participate, have the following handy:

  • Scissors
  • Tape or a stapler
  • Handout to be provided 
  • Compass or straightedge (optional)

This is an online-only event.  Occasional video recordings are made available for a fee at

September 12th, 2022 from  5:30 pm to  6:30 pm
MoMath Online
United States