Answer:
direction ratios of line AB are 4 ?1, 5 ? 2, 7 ? 3, i.e. 3, 3, 4
Also, direction ratios of line CD are 2 + 4, 9 ? 3, 2 + 6 i.e. 6,
6, 8.
As
line AB
and CD are parallel. Hence angle between line AB and CD is 0°.
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