It’s 30 minutes before the New Year and the last post for this year is a list of last year’s most popular posts. I hope that you have learned from these posts. I hope to share more proofs with you next year! I wish everyone a Happy and Prosperous New Year!

**2013 Most Popular Posts**

- The Man Behind the Proof of the Fermat’s Last Theorem
- Proof That The Sum The First N Odd Integers is a Square
- A Proof of the Arithmetic Mean Geometric Mean Inequality
- The General Formula of Polygonal Numbers
- The Proof of the Simpson Line Theorem
- Proof That the Angle Sum of a Pentagram is 180 Degrees
- Derivation of the Proof of the Area of a Rectangle
- The Proof of the Cyclic Quadrilateral Theorem
- Tangent Theorem 2
- Deriving the Formula of the Arithmetic Sequence
- Tangent Theorem 1
- The Proof of the Hypotenuse Angle Theorem