Question 1151111
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TZ is the space diagonal of the cube.  Given its length as 4*sqrt(3), the side of the cube has length 4.<br>
Picture points A and B as the midpoints of VW and YZ, respectively.   Then AB=4, AX=2, and BX is the altitude of triangle XYZ.<br>
Use the Pythagorean Theorem to find the length of altitude BX; then the area of triangle XYZ is one-half base times height....<br>