eroshea
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.
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Shadowys
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|dw:1353420552934:dw| what is F and E?
eroshea
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i don't know where to put them..
Shadowys
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I have no idea if E and F are points or so...lol
Shadowys
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DF is the height, this i know
eroshea
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|dw:1353478033352:dw|
what i did is like this.. but i don't know if its right
Shadowys
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|dw:1353420791457:dw| i think this
Shadowys
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|dw:1353420832791:dw|
Shadowys
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Yup, that's the one.