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Yumira Group Title

Given: ΔABC ≅ ΔFDE What is the length of Segment line DE rounded to the nearest tenth? 5.8 4.2 2.2 3.6

  • one year ago
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  1. Yumira Group Title
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    • one year ago
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  2. mathstudent55 Group Title
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    Do you know the distance formula?

    • one year ago
  3. Yumira Group Title
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    No ._.

    • one year ago
  4. mathstudent55 Group Title
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    For two points, (x1,y1) and (x2,y2) the distance between them is: d = sqrt((x2 - x1)^2 + (y2 - y1)^2) That looks confusing. This looks easier to understand:|dw:1355170387441:dw|

    • one year ago
  5. mathstudent55 Group Title
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    In other words, take the difference between the x values of the two points and square it. Then take the difference between the y values of the two points and square that too. Then add those two squares together and take the square root.

    • one year ago
  6. mathstudent55 Group Title
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    Now look at what you're asked for: the length of DE. Since you know the triangles are congruent, which side in the first triangle corresponds to side DE?

    • one year ago
  7. Yumira Group Title
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    Thanks (:

    • one year ago
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