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saurya_s
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Guest
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saurya_s
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twixt
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I was wrong answer is 60 degrees as guest wrote.

His reasoning is good
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myfrankenstein
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What is a CUBA ????. the adjacent planes of a cube make 90 degrees .. Am i missing something here ????
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target780
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Quote:
the adjacent planes of a cube make 90 degrees ..


myfrankenstein, this is correct regarding the two planes, ofcourse they are at 90 degrees, but that doesn't mean that the two lines in two different planes will also be at 90 degree. because you can very well visualize an another plane, where in the two diagonals are in a plane.

i perfectly concur with the reasoning given by guest, that they are at 60 degrees.... becasue the 3 diagonals will form an equilateral traingle in a plane other than the 6 faces of the cube...!
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venksune
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Oops the infamous guest is me. I seem to have forgotten to login the earlier time. I saw the post now and it seemed familiar. Thanks guys...
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myfrankenstein
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Thanks target:).
I was really baffled by this word cuba..and generally i don't look at any explanation before giving my answer. ..hence kept fixated on cuba
I never said the diagonals r at 90 degrees..just too lost in cuba...i had this trapezoid confusion earlier and hence this :)
thanks for the clarification.



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