in ceiling speaker placement

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notorious_d
notorious_d Posts: 1
edited June 2010 in Speakers
:confused:Im big polk speaker fan....I have many of them, but this time Im trying my first In ceiling speakers.
My question is : How do I know where to place them on the room and at which distance between each speaker.
It is a dining room 7.8ft heigh/ 20ft width / 19ft depth
I bough 3 pair (6 spkr) of POLK RC60i
and will be connected to a pioneer vsx-1020k receiver
THANKS IN ADVANCE FOR YOUR HELP !!