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Sahay Sir > Question Answers > NCERT Class 9 > Maths > Chapter 5 - Introduction to Euclids Geometry > 3. Consider two ‘postulates’ given below: (i) Given any two distinct points A and B, there exists a third point C which is in between A and B. (ii) There exist at least three points that are not on the same line. Do these postulates contain any undefined terms? Are these postulates consistent? Do they follow from Euclid’s postulates? Explain.

3. Consider two ‘postulates’ given below: (i) Given any two distinct points A and B, there exists a third point C which is in between A and B. (ii) There exist at least three points that are not on the same line. Do these postulates contain any undefined terms? Are these postulates consistent? Do they follow from Euclid’s postulates? Explain.

2. Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they 3. Consider two ‘postulates’ given below: (i) Given any two distinct points A and B and how might you define them? (i) parallel lines (ii) perpendicular lines (iii) line segment (iv) radius of a circle (v) square