Pi Valentine's Card - What's your sine
Show the math afficionados in your life that you love them, too, this Valentine's Day with pi-based cards that are sure to bring out the nerdy side in all of us. Perfect for those who love a good math pun! - What's your sine? (front) - It must be pi/2 because you're definitely the 1. (inside) - A2 4"x6" notecard with envelope