Circle Area: A = πr²
Square Area: A = s²
Rectangle Area: A = lw
Triangle Area: A = (1/2)bh
Sphere Volume: V = 4/3πr³
Cylinder Volume: V = πr²h
Cone Volume: V = (1/3)πr²h
Cube Volume: V = s³
Pythagorean Theorem: a² + b² = c²
Circle Circumference: C = 2πr