# 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°

**Solution:**

We use the basic definition of complementary and supplementary angles to solve the questions.

We have to solve for supplementary angle or complementary angle:

(i) 65°, 115°

Sum of measure of these two angles = 65° + 115° = 180°

Therefore, these two angles are supplementary.

(ii) 63°, 27°

Sum of measure of these two angles = 63° + 27° = 90°

Therefore, these two angles are complementary.

112°, 68°

Sum of measure of these two angles = 112° + 68° = 180°

Therefore, these two angles are supplementary.

(iv) 130°, 50°

Sum of measure of these two angles = 130° + 50° = 180°

Therefore, these two angles are supplementary.

(v) 45°, 45

Sum of measure of these two angles = 45° + 45° = 90°

Therefore, these two angles are complementary.

(vi) 80°, 10°

Sum of measure of these two angles = 80° + 10° = 90°

Therefore, these two angles are complementary.

**Video Solution:**

## 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°

### NCERT Solutions for Class 7 Maths - Chapter 5 Exercise 5.1 Question 3

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°

(i) these two angles are supplementary, (ii) these two angles are complementary, (iii) these two angles are supplementary, (iv) these two angles are supplementary, (v) these two angles are complementary, (vi) these two angles are complementary