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Math Help - Review sheet

  1. #1
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    Review sheet

    We're doing a review sheet on stuff we learned in like, the first month of school two years ago, so ive forgotten most of it. heres what i forgot:
    What are three of the four ways to name this angle? (Not stuff like Acute or Obtuse)
    Two angles are supplementary if the sum of their angles is..90 degrees, is that right?
    what are vertical, adjacent, corresponding, alternate interior, and alternate exterior angles?
    What is the associative property of addition? (i really dislike not knowing this one....)
    and finally, Graph on a number line x (< or =) -3
    thanks in advance
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Nightfire View Post
    Two angles are supplementary if the sum of their angles is..90 degrees, is that right?
    No. Two angles are complimentary if their sum is 90 degrees. They are supplementary if their sum is 180 degrees.

    Quote Originally Posted by Nightfire View Post
    What is the associative property of addition?
    (a + b) + c = a + (b + c)

    -Dan
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  3. #3
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Nightfire View Post
    what are vertical, adjacent, corresponding, alternate interior, and alternate exterior angles?
    In the following attachment, the two horizontal lines are parallel.
    1 and 3 are vertical angles. So are (2 and 4), (5 an 7), and (6 and 8). (Pairs of vertical angles are equal.)

    1 and 2 are adjacent angles. So are (2 and 3), (3 and 4), (4 and 1), (5 and 6), (6 and 7), (7 and 8), and (8 and 6). (All of these pairs of angles also happen to be supplementary. This is not required.)

    1 and 5 are corresponding angles. So are (2 and 6), (3 and 7), and (4 and 8). (Pairs of corresponding angles are equal.)

    (2 and 8) and (3 and 5) are alternate interior angles. (Pairs of alternate interior angles are equal.)

    (1 and 7) and (4 and 6) are alternate exterior angles. (Pairs of alternate exterior angles are equal.)

    -Dan
    Attached Thumbnails Attached Thumbnails Review sheet-parallel.jpg  
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  4. #4
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    wow, thanks, i was off by a ton i'll have to study up on those
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  5. #5
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    Quote Originally Posted by Nightfire View Post
    ...
    and finally, Graph on a number line x (< or =) -3
    Hello,

    I've attached the graph of this inequality.

    The filled dot indicates that the number -3 belongs to the graph. (Otherweise I would have used a small circle = hollow or empty dot).
    Attached Thumbnails Attached Thumbnails Review sheet-zahlstrahl_kl-3.gif  
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  6. #6
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    oh yeah, thanks. i had forgotten when to fill the circle and when not to and where the circle went
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