Mathematics

How many pairs of adjacent angles are formed when two lines intersect in a point?


SOLUTION
Let line '$$l$$' and '$$m$$' are intersected at a point 'o'.
Then 
$$\angle 1$$ and $$\angle 2$$
$$\angle 1$$ and $$\angle 4$$
$$\angle 3$$ and $$\angle 2$$
$$\angle 3$$ and $$\angle 4$$ are adjacent angles.
$$\therefore$$ 4 pairs of adajcent angles are formed. 
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