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Math Help - Isosceles triangle question

  1. #1
    Newbie carlotta's Avatar
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    Lightbulb Isosceles triangle question

    Is it possible to find the 2 congruent sides of an isosceles triangle given only the non-congruent side?
    I am working on a project and have found that I need to create an isosceles triangle to complete the piece and I know how wide the "base" (so to speak) will be I just need to create the two congruent sides. Help please? Thank you!
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  2. #2
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    Hello, carlotta!

    Did you make a sketch? . . . I guess not.


    Is it possible to find the 2 congruent sides of an isosceles triangle
    given only the non-congruent side?
    Code:
                                      *
    
                                     * *
    
              *                     *   *
             * *
            *   *                  *     *
           *     *
          * * * * *               * * * * *
          : - 5 - :               : - 5 - :

    A Christmas tree is 5 feet wide at the base.
    . . How tall is the tree?

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  3. #3
    Newbie carlotta's Avatar
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    I am working with a piece of fabric, I have altered the length of a piece which was a triangular end which extends past the bottom of the other pieces. It is hard to explain without a visual aid but if you isolate the "triangle" I decreased the size of the base and I need to adjust the size of the rest of the triangle accordingly and I am having some difficulty doing so. But I found while writing this that there is a much easier way to solve my problem which would be by finding out how much i decreased the base by from each side then applying that same difference to the remainder of the triangle. Sometimes I just don't think hard enough about things.
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  4. #4
    MHF Contributor
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    You can if you know the interior angles...
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