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OpenStudy (anonymous):
The figure shows a regular tetrahedron VABC with side 4 cm. M and N are the mid-points of AB and BC respectively. (a) Find the distance between V and the line AB. Express the answer in surd form. --> Ans:2√3 (b) Find the angle between the lines VM and VN. ---> how to do this?
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OpenStudy (phi):
can you find the distance MN ? and of course VN = VM = 2 sqrt(3)
OpenStudy (anonymous):
|dw:1367671938943:dw| oops i forgot to draw the graph :P
OpenStudy (phi):
yes, I figured it out.
OpenStudy (anonymous):
are you sure that VM=VN=AB?
OpenStudy (phi):
|dw:1367672017379:dw|
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