4
5.
S
Which of the following pairs of angles are complementary?
(a) 50°, 130
(b) 42, 48 (c) 36°, 64° (d) 20°, 70°
(e) 65°, 35
(1115°, 65 (9) 10°, 80° (h) 0°, 90°
Which of the following pairs of angles are supplementary?
(a) 54, 36
(0) 72°, 108 (c) 130°, 70° fo) 15°, 75°
(e) 80º, 100°
(1) 20°. 70
(9) 40°, 140° th) 0°, 180°
Write the complement of each of the following angles:
(b) 56
(c) 72°
(d) 19°
(980
(9) 45°
(h) 85
7. Write the supplement of each of the following angles:
(b) 47°
(C) 70°
(d) 15°
( 103
(9) 84°
(h) 137°
(a) 43
(e) 27
(a) 30
(e) 90°
Answers
Answer:
Step-by-step explanation:
Ncert solutions
Grade 7
Mathematics
NCERT Solutions - Mathematics, Class 7
Lines and Angles
Exercise 5.1
Question 3
Lines and Angles | Exercise 5.1
Question 3
CHAPTERS
1. Integers
2. Fractions and Decimals
3. Data Handling
4. Simple Equations
5. Lines and Angles
6. The Triangle and its properties
7. Congruence of Triangles
8. Comparing Quantities
9. Rational Numbers
10. Perimeter and Area
11. Algebraic Expressions
12. Exponents and Powers
13. Symmetry
14. Visualising Solid Shapes
EXERCISES
1. Exercise 5.1
2. Exercise 5.2
Q3) 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
Transcript
Solution 3:
i): 65° + 115° = 180°
They are supplementary angles.
ii): 63° + 27° = 90°
They are complementary angles.
iii): 112° + 68° = 180°
They are supplementary angles.
iv): 130° + 50° = 180°
They are supplementry angles.
v): 45° + 45° = 90°
They are complementary angles.
vi): 80° + 10° = 90°
They are complementary angles.