You can cut a square into four pieces, and reassemble these pieces into a triangle. Or vice versa. This makes a great little puzzle. I’ll show the solution in.
Tangram Puzzle Wooden
LEATHER BIFOLD MINIMALIST WALLET FOR MEN & WOMEN Our medium bi-fold will replace all those wallets you go through every couple years. SUPER MINIMALIST & SLIM: This wallet is extremely convenient to be carried around in your front or back pocket.