When the symbol π drawn on a piece of paper is cut up and glued onto a piece of magnetic sheet to make a DIY fridge magnet—an inexpensive fun family math activity to introduce the most popular constant in mathematics to precocious kids.
What are the chances that if some kidpreneurs decided to tailor-make some pi magnets to sell to their classmates, they could earn enough money to afford a Mother’s Day present?
by MathPlus October 8, 2021