The Conjecture which is not true is intersecting lines form 4 pairs of adjacent angles.
A conjecture is a conclusion or a proposition that is proffered on a tentative basis without proof.
For the given situation:
Generally, intersecting of lines form 2 pair of congruent angles and they are also called verticals.
If the lines are perpendicular to each other, then only it will get four congruent angles, they are all right angles.
Hence, the false statement is intersecting lines form 4 pairs of adjacent angles.
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