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Table of Contents

## Download RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1 PDF

RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1

## RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1 – Overview

### Basic Concepts

Here are the basic concepts of this exercise:

- Adjacent and Vertical Angles
- Complementary Angles
- Supplementary Angles
- Alternate Angles

### Important Topics

Here are the important topics you must cover

- Introduction
- Related Angles
- Complementary angles
- Supplementary angles
- Adjacent angles
- Linear pair
- Vertically opposite angles
- Pairs of Lines
- Intersecting lines
- Transversal
- Angles made by the transversal
- Transversal of Parallel Lines
- Checking for Parallel Lines

### Definitions

- Line: A figure that can be extended as much as you want in the opposite directions without any obligations on having the endpoints is called a line.
- Ray: The completely straight line that is starting from a fixed point moving only in one direction is called a ray.
- Line Segment: It can be defined as the line made using the two definite starting and ending points. It doesn’t have any thickness & is only a one-dimensional figure.
- Angle: An angle is formed when the two line segments are joined at a single point. It is a combination of at least two line segments meeting at a common point, called as the vertex of the angle. The sides/arms of the formed angle are those two line segments only.

### Types OF Angles

There are 6 types of angles, mentioned below:

- Acute Angle: It can be defined as angles less than 90 degrees.
- Obtuse Angle: An angle that can be defined as angles more than 90 degrees.
- Right Angle: An angle that can be defined as an angle formed exactly at 90 degrees.
- Straight Angle: An angle that can be defined as an angle formed exactly at 180 degrees.
- Reflex Angle: Angle: An angle that can be defined as an angle of mof ore 180 degrees but less than 270 degrees.
- Full Angle: An angle that can be defined as an angle formed exactly at 360 degrees.

### Related Angles

Apart from the other six angles, here are some related angles you should know about.

- Complementary Angle: When the sum of two angles measures is equivalent to 90°, then we call it the Complementary Angle.
- Supplementary Angle: When the sum of two angles measures is equivalent to 180°, then we call it the Supplementary Angle.
- Adjacent Angle: These angles are the ones having a common vertex plus a common arm. Additionally, they do not possess any common interior points.
- Linear pair: It can be defined as the pair of adjacent angles, and its non-common sides are the opposite rays.
- Vertically Opposite Angles: The vertically opposite angles formed whenever the two lines intersect with each other are always equal.

### Pairs Of Lines

- Intersecting lines: The Intersection between the two or more lines happens only if they are having a common point. The common point symbolized as O is what we call their point of intersection.
- Transversal: It can be defined as the Intersection between two or more lines at different points.
- Angles made by the transversal: When the transversal cuts the lines, then multiple different angles are formed. They are:

- Interior angles
- Exterior angles
- Pairs of Alternate interior angles
- Pairs of Alternate exterior angles
- Pairs of Corresponding angles
- Pairs of interior angles (-Similar side of the transversal-)

4. Transversal of Parallel Lines: These lines do not meet anywhere. Also, the Transversal of Parallel Lines gives birth to some interesting results.

This is the complete blog on RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1. To know more about the CBSE Class 7 Maths exam, ask in the comments.

## FAQs on RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1

### Define an intersecting line.

The Intersection between the two or more lines happens only if they are having a common point. The common point symbolized as O is what we call their point of intersection.

### What is a line segment?

It can be defined as the line made using the two definite starting and ending points. It doesn’t have any thickness & is only a one-dimensional figure.

### Define Angles made by a transversal.

When the transversal cuts the lines, then multiple different angles are formed. They are:

Interior angles

Exterior angles

Pairs of Alternate interior angles

Pairs of Alternate exterior angles

Pairs of Corresponding angles

Pairs of interior angles (-Similar side of the transversal-)

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