In triangle XYZXYZXYZ, XY⃗=−2i+6j−3k\vec{XY} = -2\mathbf{i} + 6\mathbf{j} - 3\mathbf{k}XY=−2i+6j−3k, XZ⃗=4i+j+7k\vec{XZ} = 4\mathbf{i} + \mathbf{j} + 7\mathbf{k}XZ=4i+j+7k
Find the vector YZ⃗\vec{YZ}YZ
Find the length of the line XYXYXY
