The woman says 'hunden är gråa'. What is this ? Absolute nonsens ' Throw 'Arnautit' and other children back to school !
I thought I could use "gråa" instead of "grå" because "hunden" is definite (it would be "den gråa hunden flyger inte", right?). I said "gråa" for this question and was marked wrong. Do the rules change when you use är?
Sidenote, how do you pronounce "gråa?" [groʔɑ]? [groɑ]? [groː]? Tack så mycket!
Swedish can actually use either grå or gråa for the definite. But the reason gråa doesn't work here is that it's in the predicative.
If the adjective comes before the noun, you use the definite form - and if it comes after the noun, you use the indefinite. Think of it as "the silly jester" versus "the jester is silly" - in English, there's no difference in the adjective, but Swedish frequently has different forms for the two. (These forms are called attributive and predicative, respectively, and you really don't need to remember that.)
gråa is pronounced using standard Swedish pronunciation: /ɡroːa/