NCERT Solutions for Class 7 Maths Chapter 5 - Lines and Angles

Find the complement of each of the following angles:

(i)

(ii)

(iii)

Find the supplement of each of the following angles:

(i)

(ii)

(iii)

Identify which of the following pairs of angles are complementary and which are supplementary:

(i) 65^o, 115^o

(ii) 63^o, 27^o

(iii) 112^o, 68^o

(iv) 130^o, 50^o

(v) 45^o, 45^o

(vi) 80^o, 10^o

Find the angle which is equal to its complement.

Find the angle which is equal to its supplement.

In the given figure, ∠1 and ∠2 are supplementary angles. If ∠1 is decreased, what

changes should take place in ∠2 so that both the angles still remain supplementary.

Can two angles be supplementary if both of them are:

(i) Acute

(ii) Obtuse

(iii) Right?

An angle is greater than 45^o. Is its complementary angle greater than 45^o or equal to 45^o or less than 45^o?

In the figure given below:

(i) Is ∠1 adjacent to ∠2?

(ii) Is ∠AOC adjacent to ∠AOE?

(iii) Do ∠COE and ∠EOD form a linear pair?

(iv) Are ∠BOD and ∠DOA supplementary?

(v) Is ∠1 vertically opposite to ∠2?

(vi) What is the vertically opposite angle of ∠5?

Indicate which pairs of angles are:

(i) Vertically opposite angles.

(ii) Linear pairs.