1.

The line passing through the points (3, -4) and   (-2, 6) and a line passing through (-3,6) and (9, -18) are         [AMU 1974]

A. Perpendicular 
B. Parallel
C. Makes an angle \[{{60}^{o}}\]with each other
D. None of these
Answer» C. Makes an angle \[{{60}^{o}}\]with each other


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