anonymous
  • anonymous
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
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
|dw:1353420552934:dw| what is F and E?
anonymous
  • anonymous
i don't know where to put them..
anonymous
  • anonymous
I have no idea if E and F are points or so...lol

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anonymous
  • anonymous
DF is the height, this i know
anonymous
  • anonymous
|dw:1353478033352:dw| what i did is like this.. but i don't know if its right
anonymous
  • anonymous
|dw:1353420791457:dw| i think this
anonymous
  • anonymous
|dw:1353420832791:dw|
anonymous
  • anonymous
Yup, that's the one.

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