1.

If \[X,\,\,Y,\,\,Z\] are the three points on a line and \[Y\] lies between \[X\] and\[Z\], which of the following is true?

A. \[XY+YZ=XZ\] 
B. \[XY+XZ=YZ\]
C.        \[XZ+YZ=XY\]
D.        \[\frac{1}{2}(XY+YZ)=XZ\]      
Answer» B. \[XY+XZ=YZ\]


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