Geometry — Triangles & Circles
Curated by Prabhakar Bhatt, Founder of क्रांति · Last reviewed 2 July 2026
# Geometry Cheat-Sheet
## Triangles
- Area = ½ × base × height
- Pythagoras: a² + b² = c²
- Equilateral area = (√3/4) × side²
## Circles
- Area = πr², Circumference = 2πr