**New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Pairs and Angles Self Practice 9G Solution**

**(1) State whether each pair of lines are (a) parallel or (b) not parallel Give reasons**

(a) Parallel, alternative <S equal

(b) Parallel, Co-interior <S supplementary.

(c) Not Parallel, Co-interior <S not supplementary.

(d) Parallel, Alternative <S equal.

(e) Not parallel, corr. <S not equal.

(f) Parallel, corr. <S equal.

(g) Not parallel, Alt <S not equal.

(h) Not parallel, corr. <S not equal.

**(2) Name all pairs of parallel lines in there diagonals. Give reasons.**

(a) AB ∥ DC and AD ∥ BC, co-int <S supplementary.

(b) AB ∥ CD, Alt <S equal, CD ∥ EF, Alt. <S equal.

(c) PQ ∥ RS, corr. <S equal, RS ∥ TU, corr. <S equal.