Dodecagon
/dəʊˈdekəɡən/
Definition 1 of 1
Pro Tip 1/3Geometric Context
Used in mathematics, especially in geometry, to discuss shapes with twelve sides. 
In our geometry class, we calculated the area of a dodecagon.
Pro Tip 2/3Regular vs. Irregular
A regular dodecagon has all sides and angles equal. An irregular dodecagon does not. 
A regular dodecagon is often used in tiling patterns.
Pro Tip 3/3Technical Vocabulary
Dodecagon is technical vocabulary; use it with audiences familiar with geometry. 
The architect discussed using a dodecagon shape for the new pavilion.