Math articles by AoPS students

Algebra

• Symmetry in Functional Equations
• Introduction to Logarithms
• Slope-Intercept Form Linear Equations

Geometry

• Complex Numbers in Geometry
• Synthetic Solution Using Equilateral Triangles
• Polygon Angle-Sum Theorem
• Introduction to Cartesian Coordinates in Geometry
• The Area of a Triangle

Calculus

• Introduction to Calculus

Number theory

• Simon’s Favorite Factoring Trick
• Pythagorean Triples in Elementary Number Theory
• Introduction to Modular Arithmetic

Trigonometry

• Introduction to Trigonometry
• The Law of Cosines