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# Solution - Give a Definition for Parallel Lines. Are There Other Terms that Need to Be Defined First? What Are They, and How Might You Define Them? - CBSE Class 9 - Mathematics

ConceptEuclid’S Definitions, Axioms and Postulates

#### Question

Give a definition for parallel lines. Are there other terms that need to be defined first? What are they, and how might you define them?

#### Solution

Parallel Lines :-

If the perpendicular distance between two lines is always constant, then these are called parallel lines. In other words, the lines which never intersect each other are called parallel lines.

To define parallel lines, we must know about point, lines, and distance between the lines and the point of intersection.

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#### APPEARS IN

NCERT Mathematics Textbook for Class 9 (with solutions)
Chapter 5: Introduction to Euclid's Geometry
Q: 2.1 | Page no. 85

#### Reference Material

Solution for question: Give a Definition for Parallel Lines. Are There Other Terms that Need to Be Defined First? What Are They, and How Might You Define Them? concept: Euclid’S Definitions, Axioms and Postulates. For the course CBSE
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