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      • Native Language:
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      • China
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    • Join Date: Jun 2009
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    #1

    Question right angles to the horizon

    Hi,

    I found the definition of "vertical" from vertical: Definition, Synonyms from Answers.com,

    adj.
    • Being or situated at right angles to the horizon; upright.

    In above sentence, it says "right angles to the horizon", why it is "right angles", why it isn't "left angles"??

    I think the "vertical" should be no any "left" or "right" direction to the horizon, it just related to "up" or "down".

    Thanks.
    Last edited by fenglish; 12-Jan-2010 at 03:50.

  1. DougLewis's Avatar

    • Join Date: Oct 2009
    • Posts: 41
    #2

    Re: right angles to the horizon

    Quote Originally Posted by fenglish View Post
    Hi,

    I found the definition of "vertical" from vertical: Definition, Synonyms from Answers.com,

    adj.
    • Being or situated at right angles to the horizon; upright.

    In above sentence, it says "right angles to the horizon", why it is "right angles", why it isn't "left angles"??

    I think the "vertical" should be no any "left" or "right" direction to the horizon, it just related to "up" or "down".

    Thanks.
    A right angle is a mathematical expression describing a 90 degree angle from a line.

    Vertical describes up and down from a horizontal plane.

    Perpendicular is probably a better word.

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