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eroshea Group Title

Two isosceles triangles ACB and ADB have a common base AB, and their planes form an angle of 30 degree. Find the distance DE between the vertex D and the plane containing triangle ACB if the height DF of triangle ADB is 16 cm. ----> illustration

  • 2 years ago
  • 2 years ago

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  1. Shadowys Group Title
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    |dw:1353420552934:dw| what is F and E?

    • 2 years ago
  2. eroshea Group Title
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    i don't know where to put them..

    • 2 years ago
  3. Shadowys Group Title
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    I have no idea if E and F are points or so...lol

    • 2 years ago
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    DF is the height, this i know

    • 2 years ago
  5. eroshea Group Title
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    |dw:1353478033352:dw| what i did is like this.. but i don't know if its right

    • 2 years ago
  6. Shadowys Group Title
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    |dw:1353420791457:dw| i think this

    • 2 years ago
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    |dw:1353420832791:dw|

    • 2 years ago
  8. Shadowys Group Title
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    Yup, that's the one.

    • 2 years ago
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