# RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1 (Updated For 2021-22)

RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1: You can rely totally on the RS Aggarwal Solutions Class 7 Maths, be it your class tests or assignments. It is because the solutions of RS Aggarwal Solutions Class 7 Maths Chapter 13 Ex 13.1 are very helpful in clearing your doubts. The solutions are designed by subject matter experts and are very credible.

## 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:

• Complementary Angles
• Supplementary Angles
• Alternate Angles

### Important Topics

Here are the important topics you must cover

• Introduction
• Related Angles
• Complementary angles
• Supplementary 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

1. 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.
2. Ray: The completely straight line that is starting from a fixed point moving only in one direction is called a ray.
3. 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.
4. 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:

1. Acute Angle: It can be defined as angles less than 90 degrees.
2. Obtuse Angle: An angle that can be defined as angles more than 90 degrees.
3. Right Angle: An angle that can be defined as an angle formed exactly at 90 degrees.
4. Straight Angle: An angle that can be defined as an angle formed exactly at 180 degrees.
5. Reflex Angle: Angle: An angle that can be defined as an angle of mof ore 180 degrees but less than 270 degrees.
6. 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.

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

### Pairs Of Lines

1. 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.
2. Transversal: It can be defined as the Intersection between two or more lines at different points.
3. 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-)