Let’s draw adjacent angles whose measurements are given below.

Let’s examine which pair of angles are complementary or supplementary to each other:

45°, 45° ; 120°, 30° ; 70°, 110° ; 42°,48° 37°, 43° ; 85°, 95°

a)

As 45° + 45° = 90°

Hence these angles are complementary.

They are complementary to each other.

b)

As 120° + 30° = 150°

Hence these angles are niether complemenatry nor supplementary angles.

C)

As 70° + 110° = 180°

They are supplementary.

d)

They are complementary.

e)

f)

They are supplementary