NCERT books are recommended text book for CBSE school curriculum. Most of the govt aided and private schools in India follow NCERT text books as the syllabus books for school subjects. They are written by eminent academicians and scholars from leading universities and academic institutions in India, and help in building a strong base, as well help understand each concept by relevant examples and exercises. They are termed best in term of concept building, for their usage of real life practical examples, and good end of the chapter exercises.

In this article, we have shared solved NCERT exercises for Class 7 maths Lines and Angles chapter. Lines and angles is an important chapter, as it set a base for the geometry for the future classes. These NCERT solutions will help students in solving their doubts and clarifying confusion regarding confusions regarding this chapter. Students can refer to NCERT solutions for lines and angles chapter for their conceptual understanding, as well as matching their own answers with the right solutions of the exercises.

## Class 7 math ncert solution lines and angles chapter

**Exercise 5.1 solutions**

Q1 – Find the complement of each of the following angles: View solution

Q2 – Find the supplement of each of the following angles: View solution

Q3 – Identify which of the following pairs of angles are complementary and which are supplementary. (i) 65º, 115º (ii) 63º, 27º (iii) 112º, 68º (iv) 130º, 50º (v) 45º, 45º (vi) 80º, 10º View solution

Q4 – Find the angle which is equal to its complement. View solution

Q5 – Find the angle which is equal to its supplement. View solution

Q6 – 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. View solution

Q7- Can two angles be supplementary if both of them are: (i) acute? (ii) obtuse? (iii) right? View solution

Q8 – An angle is greater than 45º. Is its complementary angle greater than 45º or equal to 45º or less than 45º? View solution

Q9 – 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? View solution

Q10 – Indicate which pairs of angles are: (i) Vertically opposite angles. (ii) Linear pairs. View solution

Q11 – In the following figure, is ∠1 adjacent to ∠2? Give reasons View solution

Q12 – Find the values of the angles x, y, and z in each of the following: View solution

Q13 – Fill in the blanks: (i) If two angles are complementary, then the sum of their measures is _______. (ii) If two angles are supplementary, then the sum of their measures is ______. (iii) Two angles forming a linear pair are _______________. (iv) If two adjacent angles are supplementary, they form a ___________. (v) If two lines intersect at a point, then the vertically opposite angles are always _____________. (vi) If two lines intersect at a point, and if one pair of vertically opposite angles are acute angles, then the other pair of vertically opposite angles are __________. View solution

Q14 – In the adjoining figure, name the following pairs of angles. (i) Obtuse vertically opposite angles (ii) Adjacent complementary angles (iii) Equal supplementary angles (iv) Unequal supplementary angles (v) Adjacent angles that do not form a linear pair View solution

**Exercise 5.2 solutions**

Q1 – State the property that is used in each of the following statements? (i) If a || b, then ∠1 = ∠5. (ii) If ∠4 = ∠6, then a || b. (iii) If ∠4 + ∠5 = 180°, then a || b. View solution

Q2 – In the adjoining figure, identify (i) the pairs of corresponding angles. (ii) the pairs of alternate interior angles. (iii) the pairs of interior angles on the same side of the transversal. (iv) the vertically opposite angles. View solution

Q3 – In the adjoining figure, p || q. Find the unknown angles. View solution

Q4 – Find the value of x in each of the following figures if l || m. View solution

Q5 – In the given figure, the arms of two angles are parallel. If ∠ABC = 70º, then find (i) ∠DGC (ii) ∠DEF View solution

Q6 – In the given figures below, decide whether l is parallel to m View solution

## End Note

In the article, we have shared solutions for ncert exercises for class 7 maths for lines and angles chapter. Students can click to respective chapters and refer to the right solution. We advise students to refer to them as clearing their concepts, and matching their solutions. Student should not use them to copy solutions for their homework and instead should try to solve homework on own, as it will impact their learning process.

In case you have any doubts regarding solution, or need further clarification, you can write to us. You can also reach out to us, in case you have doubt in other text books’ problems or school exam papers. We will be glad to assist you in helping with your doubt.

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