How many pairs of adjacent angles are formed when two lines intersect in a point?
To do:
We have to find the number of pairs of adjacent angles formed when two lines intersect in a point.
Solution:
If two lines $AB$ and $CD$ intersect each other at a point $O$, then the following four pairs of linear pairs are formed.
$\angle AOC, \angle BOC; \angle BOC, \angle BOD; \angle BOD, \angle AOD$ and $\angle AOD, \angle AOC$.
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