Premium Online Home Tutors

3 Tutor System

Starting just at 265/hour

Answer :

(i) we know that sum of all angle of a triangle = 180

\(\angle \) x + 50° + 60° = 180°

Or, \(\angle \) x + 110° = 180°

\(\therefore \) \(\angle \)x = 180° – 110° = 70°

(ii) we know that sum of all angle of a triangle = 180

\(\angle \)x + 90° + 30 = 180° [\(\triangle \) is right angled triangle]

Or, \(\angle \)x + 120° = 180°

Or, \(\angle \)x – 180° – 120° = 60°

(iii) we know that sum of all angle of a triangle = 180

\(\angle \)x + 30° + 110° =180°

Or, \(\angle \)x + 140° = 180°

\(\therefore \) \(\angle \)x = 180° – 140° = 40°

(iv ) we know that sum of all angle of a triangle = 180

\(\angle \)x + \(\angle \)x + 50° = 180°

Or, 2x + 50° = 180°

Or, 2x = 180° – 50°

Or, 2x = 130°

\(\therefore \) x=130/2=65°

(v) we know that sum of all angle of a triangle = 180

\(\angle \)x + \(\angle \)x +\(\angle \)x =180°

Or, 3 \(\angle \)x = 180°

\(\therefore \) \(\angle \)x=180°/3=60°

(vi) we know that sum of all angle of a triangle = 180

x + 2 x + 90° = 180° (\(\triangle \) is right angled triangle)

Or, 3x + 90° = 180°

Or, 3x = 180° – 90°

Or, 3x = 90°

\(\therefore \) x=90/3=30°

- NCERT solutions for class 7 maths chapter 1 Integers
- NCERT solutions for class 7 maths chapter 2 Fractions and Decimals
- NCERT solutions for class 7 maths chapter 3 Data Handling
- NCERT solutions for class 7 maths chapter 4 Simple Equations
- NCERT solutions for class 7 maths chapter 5 Lines and Angles
- NCERT solutions for class 7 maths chapter 6 The Triangle and its Properties
- NCERT solutions for class 7 maths chapter 7 Congruence of Triangles
- NCERT solutions for class 7 maths chapter 8 Comparing Quantities
- NCERT solutions for class 7 maths chapter 9 Rational Numbers
- NCERT solutions for class 7 maths chapter 10 Practical Geometry
- NCERT solutions for class 7 maths chapter 11 Perimeter and Area
- NCERT solutions for class 7 maths chapter 12 Algebraic Expressions
- NCERT solutions for class 7 maths chapter 13 Exponents and Powers
- NCERT solutions for class 7 maths chapter 14 Symmetry
- NCERT solutions for class 7 maths chapter 15 Visualising Solid Shapes

- NCERT solutions for class 7 science chapter 1 Nutrition in Plants
- NCERT solutions for class 7 science chapter 2 Nutrition In Animals
- NCERT solutions for class 7 science chapter 3 Fibre to Fabric
- NCERT solutions for class 7 science chapter 4 Heat
- NCERT solutions for class 7 science chapter 5 Acids Bases and Salts
- NCERT solutions for class 7 science chapter 6 Physical and Chemical Changes
- NCERT solutions for class 7 science chapter 7 Weather, Climate and Adaptations of Animals to Climate
- NCERT solutions for class 7 science chapter 8 Winds, Storms and Cyclones
- NCERT solutions for class 7 science chapter 9 soil
- NCERT solutions for class 7 science chapter 10 Respiration in Organisms
- NCERT solutions for class 7 science chapter 11 Transportation in Animals and Plants
- NCERT solutions for class 7 science chapter 12 Reproduction In Plant
- NCERT solutions for class 7 science chapter 13 Motion and Time
- NCERT solutions for class 7 science chapter 14 Electric Current and Its Effects
- NCERT solutions for class 7 science chapter 15 Light
- NCERT solutions for class 7 science chapter 16 Water: A Precious Resource
- NCERT solutions for class 7 science chapter 17 Forests: Our Lifeline
- NCERT solutions for class 7 science chapter 18 Waste Water Story