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Math Help - Properties of Triangles

  1. #1
    Junior Member
    Joined
    Jun 2007
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    Properties of Triangles

    I missed a week of school and I have a quiz tom on properties of triangles can someone give me a little review on it.

    For example
    Scalane traingle

    bottom right side is (x-15)deg
    on the left corner there is an suplmentary extension of 150 so you sutract is by 180 and that gives you 30.
    But it says solve for x which is the top of the triangle and im not sure how to do it....
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  2. #2
    Super Member

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    Lexington, MA (USA)
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    Hello, Skoz!

    Scalane triangle
    Bottom right side is (x-15)deg
    On the left corner there is an supplementary extension of 150
    so you subtract from180 and that gives you 30.
    It says: solve for x which is the top of the triangle
    I assume the diagram looks like this.
    Code:
                  *
                 /  \
                /  x  \
               /        \
              /           \
             /              \
            /                 \
      150 / 30           x-15 \
          * - - - - - - - - - - - *

    You're expected to know that the three angles of a triangle add up to 180.

    So you have: . x + (x - 15) + 30\:=\:180

    Got it?

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  3. #3
    Junior Member
    Joined
    Jun 2007
    Posts
    52
    Yes i got it thanks
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