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

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

(i) 65°, 115° (ii) 63°, 27°

(iii) 112°, 68° (iv) 130°, 50°

(v) 45°, 45° (vi) 80°, 10°

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°. Is its complementary angle greater than 45° or equal to 45° or less than 45°?

In the adjoining figure:

(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 ∠4?

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

Indicate which pairs of angles are:

(i) Vertically opposite angles. (ii) Linear pairs.

In the following figure, is ∠1 adjacent to ∠2? Give reasons.

Find the value of the angles x, y, and z in each of the following:

        (i)                                   (ii)