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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for A hexagon has six of them:

EDGES: A hexagon has six of them
ANGLE: One of a hexagon's six
SIDE: One of a hexagon's six
ANGLE: One of six in a hexagon
SIDE: One of six for a hexagon
SIDE: One of six on a hexagon