NCERT Class 9

3. In Fig. 6.15, angle PQR = angle PRQ, then prove that angle PQS = angle PRT. 3. In Fig. 6.15 angle PQR = angle PRQ then prove that angle PQS = angle PRT. October 15, 2020 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,

2. In Fig. 6.14, lines XY and MN intersect at O. If angle POY = 90° and a : b = 2 : 3, find c. 2. In Fig. 6.14 find c. lines XY and MN intersect at O. If angle POY = 90° and a : b = 2 : 3 October 15, 2020 [...]

1. In Fig. 6.13, lines AB and CD intersect at O. If angle AOC + angle BOE = 70° and angle BOD = 40°, find angle BOE and reflex angle COE. 1. In Fig. 6.13 find angle BOE and reflex angle COE. lines AB and CD intersect at O. If angle AOC + angle BOE [...]

Example 3 : Consider the following statement : There exists a pair of straight lines that are everywhere equidistant from one another. Is this statement of direct consequence of Euclid’s fifth postulate? Explain​ 2. Give a definition for each of the following terms. Are there other terms that need to be defined first? What are [...]

Example 2 : Prove that an equilateral triangle can be constructed on any given line segment. Example 2 : Prove that an equilateral triangle can be constructed on any given line segment. October 15, 2020 Category: Chapter 5 - Introduction to Euclids Geometry , Maths , NCERT Class 9 ,

Example 1 : If A, B and C are three points on a line, and B lies between A and C then prove that AB + BC = AC. and B lies between A and C then prove that AB + BC = AC. B and C are three points on a line Example 1 [...]

2. Does Euclid’s fifth postulate imply the existence of parallel lines? Explain. 2. Does Euclid’s fifth postulate imply the existence of parallel lines? Explain. October 15, 2020 Category: Chapter 5 - Introduction to Euclids Geometry , Maths , NCERT Class 9 ,

1. How would you rewrite Euclid’s fifth postulate so that it would be easier to understand? 1. How would you rewrite Euclid’s fifth postulate so that it would be easier to understand? October 15, 2020 Category: Chapter 5 - Introduction to Euclids Geometry , Maths , NCERT Class 9 ,

7. Why is Axiom 5, in the list of Euclid’s axioms, considered a ‘universal truth’? (Note that the question is not about the fifth postulate.) 7. Why is Axiom 5 considered a ‘universal truth’? (Note that the question is not about the fifth postulate.) in the list of Euclid’s axioms October 15, 2020 Category: Chapter [...]

6. In Fig. 5.10, if AC = BD, then prove that AB = CD. 6. In Fig. 5.10 if AC = BD then prove that AB = CD. October 15, 2020 Category: Chapter 5 - Introduction to Euclids Geometry , Maths , NCERT Class 9 ,