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Math Help - diagonals and decagon

  1. #1
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    diagonals and decagon

    I'm having trouble with this problem

    How many diagonals can be drawn from one vertex of a regular decagon?
    a.7
    b.8
    c.10
    d.70
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  2. #2
    Member Henderson's Avatar
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    There are ten vertices in a decagon; from one vertex you can draw a segment to any of the other nine vertices. Two of those segments are sides in the decagon, the other seven are diagonals.
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  3. #3
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    Quote Originally Posted by Russianguy131517 View Post
    I'm having trouble with this problem

    How many diagonals can be drawn from one vertex of a regular decagon?
    a.7
    b.8
    c.10
    d.70
    sounds like 8 to me. The two adjacent corners aren't diagonals
    ...lew...
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