Area of Regular Dodecagon
- Nenad Đapić
Formula for area of regular dodecagon can be easily derived from this Geogebra illustration. There are 6 squares and 6 triangles and one regular hexagon which can be replaced with 6 additional regular triangles inside of a regular dodecagon. Therefore, the formula is A = 6 a^2 + 3 a^2 sqrt(3).