五角 ごかく Meanings Noun, の-adjective pentagon Kanji 五 five. Read as ゴ. 角 angle. Read as カク. Words containing 五角 五角形 (ごかくけい) pentagon 五角錐 (ごかくすい) pentagonal pyramid 五角柱 (ごかくちゅう) pentagonal prism And 1 more. Jinuma: Japanese Dictionary · Word lists