# CBSE Class 7 Maths Revision Notes Chapter 5

## H1 – CBSE Class 7 Mathematics Revision Notes Chapter 5 – Lines and Angles

The students preparing for the board exams have to work diligently and practise as much as possible. As competitiveness is rising, it is essential for students to revise and practise all the chapters thoroughly. As the course is vast, there is a possibility of missing certain points to revise. In this scenario, students should check Class 7 Mathematics chapter 5 notes. According to the official CBSE guidelines, all pertinent questions and topics are covered. Extramarks advises students to read the class 7 chapter 5 mathematics notes along with the NCERT textbooks to achieve high exam scores. To prepare for the board exam, one can access a variety of study materials from the Extramarks website, including CBSE sample papers, CBSE previous year question papers, CBSE additional questions, and many others. The chapter 5 mathematics class 7 notes are prepared using easy-to-understand language. Regular revision of the notes will help the students score good marks.

The students are advised to read the class 7 mathematics notes chapter 5 in accordance with the NCERT books.

## H3 – Definitions:

Angle:

An angle is created by joining two line segments at one point, or we can say that an angle is the combination of two line segments at a common endpoint. The two-line segments that make up the formed angle are its sides or arms, and this shared point is known as the angle’s vertex.

## H3 -Related Angles:

The topics covered under related angles include:

• Complementary Angle: The sum of two angles’ measurements is 90°.
• Supplementary Angle: The sum of the two angles’ measurements is 180°.
• Adjacent Angle: They have a common vertex and a common arm, but no common interior points.
• Linear pair: A pair of adjacent angles with opposite rays on their non-common sides.

## H3 -Pairs of Lines:

There are 2 types of Pair of lines. They are Transversal lines and Intersecting lines. Let us understand them in detail.

• Intersecting Lines:

When 2 lines cross each other at one and only one point then these lines are called intersecting lines and the point at which they intersect is called the point of interaction.

• Transversal Lines:

When two or more 2 distinct lines get intersect by a common line then that common line is known as a transversal line.

## H3 -About CBSE Solutions for Lines and Angles Class 7 Notes

The students can better understand the main ideas of the crucial chapter “Lines and Angles” with the aid of the Class 7 Mathematics Chapter 5 Notes. The notes that were written are thorough and adhere to CBSE regulations. The aspirants would comprehend the chapter more after reading these CBSE revision notes.

Regular reading of the class 7 mathematics notes chapter 5 would help the students because-

• The wording is clear and simple to comprehend.
• The notes are written in accordance with the most recent CBSE recommendations.
• There are plenty of instances provided to support the ideas.
• The chapter 5 mathematics class 7 notes cover all the important elements.
• The entire note has been carefully curated by Extramarks’ subject matter experts.

## H3 -Types of Angles

There are six different types of angles, namely-

1. Right Angle: The angle is exactly 90 degrees.

For example:

1. Acute Angle: The angle is less than 90 degrees.
2. Straight Angle: The angle is exactly 180 degrees.
3. Obtuse Angle: The angle is more than 90 degrees and less than 180 degrees.
4. Reflex Angle: The angle is more than 180 degrees but less than 270 degrees.
5. Full Angle: A 360-degree angle is called a full angle.

## H3 -Example

### 1. What is a transversal line?

A line that crosses two or more lines at different locations is said to be a transversal line.

### 2. What are the different angles that are made by the transversal cuts?

The different angles that are made include:

• Interior angles
• Exterior angles
• Pairs of corresponding angles
• Pairs of alternate interior angles
• Pairs of alternate exterior angles
• Pairs of interior angles on the same side of the transversal

### 3. What is a line segment?

A line segment is a line which has a definite end point.

### 4. What is a line?

A line is a line segment which infinitely extends on both ends.

### 5. What is a ray?

A ray is a line which has one definite endpoint.