• Three is the first odd prime number, and the second smallest positive prime. Three is the first unique prime due to the properties of its reciprocal.
• Three is the second triangular number and it is the only prime triangular number. Three is the only prime which is one less than a perfect square.
• Three non-collinear points determine a plane and a circle.
• Three is the fourth Fibonacci number and the third that is unique.
• Vulgar fractions with 3 in the denominator have a single digit repeating sequences in their decimal expansions, (.000…, .333…, .666…, .999…)
• A triangle is the most durable shape possible, the only “perfect” figure which if all endpoints have hinges will never change its shape unless the sides themselves are bent.
• 3 is the only integer between e and π.
• Only three tetrahedral numbers are also perfect squares. (Click here for more information on the number 3.)

• Three is the number of years we have been together. Looks like we are triangle material. Love you.

Can you say “Hello dimples?!”

:::snickering quietly to self:::