Based on the clue 'a decagon has this many sides', what is the answer?

Based on the clue 'a decade after crosswords were invented this compa...', what is the answer? Based on the clue 'a decade after politically incorrect he launched r...', what is the answer? Based on the clue 'a decade after winning an emmy for seinfeld she wo...', what is the answer? Based on the clue 'a decade before roots alex haley collaborated on t...', what is the answer? Based on the clue 'a deceased statesman displayed to the general publ...', what is the answer? What is referred to by 'a deceit'? What is associated with: a december 1999 storm in this city flooded the basement of the state hermitage museum? What is associated with: a december 2010 news story said this product was angling for prince william who was just 28 as…