#### Chapters

Chapter 2: Fractions and Decimals

Chapter 3: Data Handling

Chapter 4: Simple Equations

Chapter 5: Lines and Angles

Chapter 6: The Triangle and its Properties

Chapter 7: Congruence of Triangles

Chapter 8: Comparing Quantities

Chapter 9: Rational Numbers

Chapter 10: Practical Geometry

Chapter 11: Perimeter and Area

Chapter 12: Algebraic Expressions

Chapter 13: Exponents and Powers

Chapter 14: Symmetry

Chapter 15: Visualising Solid Shapes

#### NCERT Mathematics Class 7

## Chapter 5: Lines and Angles

#### Chapter 5: Lines and Angles Exercise 5.10 solutions [Pages 101 - 103]

Find the complement of the following angles:

Find the complement of the following angles:

Find the complement of the following angles:

Find the supplement of the following angles:

Find the supplement of the following angles:

Find the supplement of the following angles:

Identify the given pairs of angles are complementary or supplementary.

65°, 115°

Identify the given pairs of angles are complementary or supplementary.

63°, 27°

Identify the given pairs of angles are complementary or supplementary.

112°, 68°

Identify the given pairs of angles are complementary or supplementary.

130°, 50°

Identify the given pairs of angles are complementary or supplementary.

45°, 45°

Identify the given pairs of angles are complementary or supplementary.

80°, 10°

Find the angle which is equal to its complement.

Find the angle which is equal to its supplement.

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.

Can two angles be supplementary if both of them are:acute?

Can two angles be supplementary if both of them are:Obtuse?

Can two angles be supplementary if both of them are:Right?

An angle is greater than 45°. Is its complementary angle greater than 45° or equal to 45° or less than 45°?

In the adjoining figure:

(1) Is ∠1 adjacent to ∠2?

(2) Is ∠AOC adjacent to ∠AOE?

(3) Do ∠COE and ∠EOD form a linear pair?

(4) Are ∠BOD and ∠DOA supplementary?

(5) Is ∠1 vertically opposite to ∠4?

(6) What is the vertically opposite angle of ∠5?

Indicate which pairs of angles are Vertically opposite angles.

Indicate which pairs of angles are: Linear pairs.

In the following figure, is ∠1 adjacent to ∠2? Give reasons.

Find the value of the angles *x*, *y*, and *z* in the following

Find the value of the angles *x*, *y*, and *z* in the following:

Fill in the blanks:

If two angles are complementary, then the sum of their measures is _______.

Fill in the blanks:

If two angles are supplementary, then the sum of their measures is _______.

Fill in the blanks:

If two angles are supplementary, then the sum of their measures is _______.

Fill in the blanks:

Two angles forming a linear pair are ______

Fill in the blanks:

If two adjacent angles are supplementary, they form a _______.

Fill in the blanks:

If two lines intersect at a point, then the vertically opposite angles are always ______

Fill in the blanks:

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 _______.

In the adjoining figure, name the following pairs of angles.

1) Obtuse vertically opposite angles

2) Adjacent complementary angles

3) Equal supplementary angles

4) Unequal supplementary angles

5) Adjacent angles that do not form a linear pair

#### Chapter 5: Lines and Angles Exercise 5.20 solutions [Pages 110 - 111]

State the property that is used in each of the following statements?

1) If a||b, then ∠1 = ∠5

2) If ∠4 = ∠6, then a||b

3) If ∠4 + ∠5 = 180°, then a||b

In the adjoining figure, identify

(1) The pairs of corresponding angles

(2) The pairs of alternate interior angles

(3) The pairs of interior angles on the same side of the transversal

(4) The vertically opposite angles

In the adjoining figure, *p *|| *q*. Find the unknown angles.

Find the value of x in the following figures if l || m.

Find the value of *x* in the following figure if *l *|| *m*.

In the given figure, the arms of two angles are parallel.

If ∠ABC = 70°, then find

(1) ∠DGC

(2) ∠DEF

In the given figure below, decide whether l is parallel to m

In the given figure below, decide whether l is parallel to m

In the given figure below, decide whether l is parallel to m

In the given figure below, decide whether l is parallel to m

## Chapter 5: Lines and Angles

#### NCERT Mathematics Class 7

#### Textbook solutions for Class 7

## NCERT solutions for Class 7 Mathematics chapter 5 - Lines and Angles

NCERT solutions for Class 7 Maths chapter 5 (Lines and Angles) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Mathematics for Class 7 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com are providing such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 7 Mathematics chapter 5 Lines and Angles are Introduction to Lines and Angles, Complementary Angles, Supplementary Angles, Adjacent Angles, Concept of Linear Pair, Concept of Vertically Opposite Angles, Pairs of Lines - Intersecting Lines, Pairs of Lines - Transversal, Pairs of Lines - Angles Made by a Transversal, Pairs of Lines - Transversal of Parallel Lines, Checking for Parallel Lines.

Using NCERT Class 7 solutions Lines and Angles exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 7 prefer NCERT Textbook Solutions to score more in exam.

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