Two lines AB and CD intersect at 0 (see the figure). Write all the pai

1.	Two lines AB and CD intersect at 0 (see the figure). Write all the pairs of adjacent angles by taking angles 1, 2, 3 and 4 only.
Answer» Two angles are called adjacent angles, if they have a common vertex and a common arm, but no common interior points. Hence, following are the pairs of adjacent angles taking 1,2, 3, 4 angles only, i.e. ∠1, ∠2 ; ∠2, ∠3; ∠3, ∠4; ∠4, ∠1.

Two lines AB and CD intersect at 0 (see the figure). Write all the pairs of adjacent angles by taking angles 1, 2, 3 and 4 only.

Answer»

Two angles are called adjacent angles, if they have a common vertex and a common arm, but no common interior points.

Hence, following are the pairs of adjacent angles taking 1,2, 3, 4 angles only,

i.e. ∠1, ∠2 ; ∠2, ∠3; ∠3, ∠4; ∠4, ∠1.