Question:
How many pairs of adjacent angles are formed when two lines intersect at a point?
Solution:
Four pairs of adjacent angles will be formed when two lines intersect at a point.
Considering two lines AB and CD intersecting at O
The 4 pairs are:
(∠AOD, ∠DOB), (∠DOB, ∠BOC), (∠COA, ∠AOD) and (∠BOC, ∠COA)
Hence, 4 pairs of adjacent angles are formed when two lines intersect at a point.