1.

In the given figure, \[\angle 1\cong \angle 4.\] Which of the following conclusions does not have to be true?

A. \[\angle 3\] and \[\angle 4\]are supplementary angles.
B.  Line\[l\]is parallel to line m.
C. \[\angle 1\cong \angle 3\]
D. \[\angle 2\cong \angle 3\]
Answer» B.  Line\[l\]is parallel to line m.


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