Here's what to know about the holiday, as well as how to celebrate for math enthusiasts. What is Square Root Day? Vector illustration of square root alt icon on white background.

Memorising key square roots and using mental math tricks saves time. Techniques like the nearby perfect square trick and weighted averaging enhance problem-solving skills.

That’s 3/3/09 with three being the square root of nine, because, of course, three times three equals nine, which math nerds already knew, but the rest of us had to have explained with diagrams ...

Square Root Day was founded by Ron Gordon, a teacher in Redwood City. He keeps this website up about the special day. Gordon suggests it's a good day to get things squared away, or go square dancing.

Memorising key square roots and using mental math tricks saves time. Techniques like the nearby perfect square trick and weighted averaging enhance problem-solving skills.