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Math Help - Rhombus

  1. #1
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    Rhombus

    ABC & ADC are 2 equilateral triangles on a common base AC (as shown in the attached image). How do I show that ABCD is a rhombus?

    Thanks,

    Ron
    Attached Thumbnails Attached Thumbnails Rhombus-quad2.gif  
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  2. #2
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    What do you know about the angles of an equilateral triangle?
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  3. #3
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    OK...I got it....thanks....
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