dodecagon
A polygon with twelve sides and twelve angles. Used in geometry contexts.
Please calculate the sum of the interior angles of a dodecagon.
This coin is shaped like a dodecagon.
多角形 is a general term for polygon, while 十二角形 specifically refers to a twelve-sided polygon.
五角形 is a pentagon (5 sides), whereas 十二角形 has 12 sides.
Standard kanji spelling for dodecagon.
Compound of 十二 (twelve) + 角形 (polygon). The reading じゅうにかっけい is a common colloquial variant due to gemination.