Lines and Angles

Lines and Angles

Sainik School Class 6 Maths Chapter 12 Lines and Angles Simplify with Easy Examples

Do you also see Sainik School Class 6 Maths Lines and Angles chapter 12 hard? If yes, there is no need to worry. You can perform good in Sainik School Class 6 Maths Lines and Angles by practicing with notes, important questions, model papers, mock tests and PYQs. With the help of this chapter, you can easily understand the concept of different lines, types of angles.


Moreover, this guide explains Sainik School Class 6 Lines and Angles in a simple way. so, you can easily score well in the AISSEE 2027.

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What Are Lines and Angles in Class 6 Sainik School Maths?

As per the concepts of the geometry math chapter, a line is defined as a straight line which extends endlessly in both directions and doesn’t have any endpoints. An angle is formed by two rays meeting at one point. This point is known as the vertex.


For instance, the hands of a clock create an angle. Likewise, the edges of a book can give you an idea about straight lines. In Sainik School Class 6 Maths Lines and Angles, students are introduced to such basic concepts prior to answering examination questions.


 Also Check: Sainik School Admission Eligibility 2027-28 Class 6 and 9 Guide

How Many Types of Lines in Maths?

There are different types of lines. Let's understand them with simple examples.


  • Parallel Lines: These lines never meet, even when extended. Railway tracks are a common example.

  • Intersecting Lines: These lines cross each other at one point.

  • Perpendicular Lines: These lines meet at a right angle of 90°.

  • Line Segment: It is a part of a line with two end points.

  • Ray: It starts at one point and continues forever in one direction.


Therefore, understanding these lines makes Sainik School Class 6 Lines and Angles chapter easier to learn.

How Many Types of Angles?

There are many types of Angles, look at the table below.

Type of angle

Measurement

Example

Acute angle

Less than 90°

45°

Right angle

Exactly 90°

Corner of a square

Obtuse angle

More than 90° but less than 180°

120°

Straight angle

Exactly 180°

A straight line

Reflex angle

More than 180° but less than 360°

240°

Complete angle

Exactly 360°

One full turn


For example, a 60° angle is acute. However, a 130° angle is obtuse. These simple rules help you to solve AISSEE Class 6 Lines and Angles questions easily.


Also Check: Sainik School Class 6 Syllabus 2027 Complete Subject-Wise Syllabus and Exam Pattern

Easy Examples of Lines and Angles

By solving some important examples of Sainik School Class 6 Maths Lines and Angles chapter, you can easily understand the concepts. 


Example 1: Find the missing angle.

Two complementary angles are 30° and x.


Solution:

30° + x = 90°

x = 90° − 30°


Answer: x = 60°


Example 2: Find the missing angle on a straight line.

One angle is 110°. Find the other angle.


Solution:

110° + x = 180°

x = 180° − 110°


Answer: x = 70°


Example 3: Find the vertically opposite angle.

One angle is 75°. What is its vertically opposite angle?


Vertically opposite angles are equal.


Answer: 75°

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