How many letters does the top answer for “having six angles; hexagonal. dryden.” have?

The most common answer is sexangled (9 letters).

Crossword clue: having six angles; hexagonal. dryden.

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

sexangled 9 letters web-def

Having six angles; hexagonal. [R.] Dryden.

sexangular 10 letters web-def

Having six angles; hexagonal. [R.] Dryden.

having six angles or corners. 50% similar → hexangular