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# NCERT Solutions for Class 9 Maths, Chapter 5 - Introduction to Euclid's Geometry

NCERT Class 9 Maths Chapter 5 starts with the introduction of geometry. Geometry
appears to have originated from the need for measuring land. This chapter highlights
the contribution of the Greek mathematician – Euclid. He collected and summarised his
entire work, especially his thesis called ‘Elements’ in Alexandria, Ptolemaic Egypt. His
books depict the history of geometry and also the axioms and five postulates given by
him. In NCERT Class 9, chapter 5, you’ll study about Euclid’s geometrical concepts and
how they are practical even today!

## Let’s take a look at Class 9 Maths, Chapter 5 – Introduction to Euclid’s Geometry

5.1 Introduction
5.2 Euclid’s Definitions, Axioms and Postulates
5.3 Equivalent Versions of Euclid’s Fifth Postulate
5.4 Summary

## In Class 9 Maths Chapter 5, you will learn –

Section 5.2 - The Greek mathematician ‘Euclid’ studied Geometry by observing abstract
objects around him and derived terms such as point, line, plane or a surface, solid
shapes and their sizes, position, space, etc. He also studied the dimensions of these
geometrical objects and noted down his conclusions in the form of definitions, axioms
and five postulates. In this section, you’ll learn ‘Euclid’s five postulates’ and further
results proved by him.

Section 5.3 - This section discusses Euclid’s fifth postulate and its importance in the
history of Mathematics.

All the concepts in this chapter are explained meticulously with axioms &amp; proofs,
examples &amp; solutions. Solved examples are also given for better understanding. To
know more about the exercises, explore the NCERT Solutions for Class 9 Maths -
Chapter 5 Introduction to Euclid’s Geometry below.  You can also download the
NCERT Solutions for Class 9 Maths Chapter 5 PDF, solved by expert maths trainers.

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