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# RD Sharma Class 9 Solutions Chapter 8 - Lines and Angles (Ex 8.4) Exercise 8.4

Last updated date: 20th May 2024
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## RD Sharma Class 9 Solutions Chapter 8 - Lines and Angles (Ex 8.4) Exercise 8.4 - Free PDF

Free PDF download of RD Sharma Class 9 Solutions Chapter 8 - Lines and Angles Exercise 8.4 solved by Expert Mathematics Teachers on Vedantu.com. All Chapter 8 - Lines and Angles Ex 8.4 Questions with Solutions for RD Sharma Class 9 Maths are provided to help you to revise complete Syllabus and score more marks. Register for online coaching for IIT JEE (Mains & Advanced) and other engineering entrance exams.

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## FAQs on RD Sharma Class 9 Solutions Chapter 8 - Lines and Angles (Ex 8.4) Exercise 8.4

1. What are the properties of a line mentioned in RD Sharma Class 9 Solutions Chapter 8 - Lines and Angles (Ex 8.4)?

Since there are different kinds of lines in geometry, each of them has different kinds of properties. However, there are some common properties of lines that can be listed.

Properties of Lines:

• A line can be defined as a set of an endless number of points placed closely to each other.

• They extend infinitely in both directions of their points.

• Lines are one-dimensional and do not have any depth, breadth or thickness.

2. What are the properties of an angle mentioned in RD Sharma Class 9 Solutions Chapter 8 - Lines and Angles (Ex 8.4)?

Since there are different kinds of angles in geometry, each of them has different kinds of properties. However, there are some common properties of angles that can be listed.

Properties of Angles

• An angle is formed when two rays join each other at a point in the same plane.

• The rays forming the angle are called arms of the angle and the point at which the two rays meet to form an angle is called the vertex. Refer to the Vedantu website or app for an elaborate and easy explanation.

3. Are linear pairs of angles always congruent?

Linear pairs of angles necessarily are not always congruent. When the measure of each of the angles is 90 degrees, only then linear pairs of angles are considered to be congruent. But, linear pairs of angles can always be supplementary.

4. What is a line segment according to RD Sharma Class 9 Solutions Chapter 8 - Lines and Angles (Ex 8.4)?

A line segment is merely a part of a line. It has two fixed end points, a fixed length and measurement. The length of a line segment can be measured in metric units such as millimetres, centimetres or other customary/standard units like foot or inches.

5. What are all the geometric tools one can use while studying lines and angles?

While studying lines and angles, students can use tools like ruler, compass, protractor, divider, set squares etc.