S.chand publication New Learning Composite mathematics solution of class 7 Chapter 9 Pairs and Angles Exercise 9B

 Exercise 9B

Question 1

Name the pair of angles marked as A for alternate, B for corresponding and C for co-interior.

Sol :

(a) A

(b) B

(c) C

(d) A

(e) C

(f) B

(g) B

(h) A

Question 2

Give examples of each angle pair.

(a) corresponding angles

Ans. ∠1 and ∠3, ∠2 and ∠4, ∠5 and ∠7, ∠6 and ∠8

(b) alternate angles

Ans. ∠2 and ∠7, ∠6 and ∠3

(c) co-interior angles

Ans. ∠2 and ∠3, ∠6 and ∠7

(d) vertically opposite angles.

Ans. ∠1 and ∠6, ∠2 and ∠5, ∠3 and ∠8, ∠4 and ∠7

Question 3

Name the type of angle pair shown in each letter.

Sol :

(a) Corresponding ∠S

(b) Alternate ∠S

(c) Co interior ∠S