Transcription of Chapter 12 Introduction to Three Dimensional Geometry
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Class XI Chapter 12 introduction to three dimensional geometry Maths Page 1 of 17 Website: Email: Mobile: 9999 249717 Head Office: 1/3-H-A-2, Street # 6, East Azad Nagar, Delhi-110051 (One Km from Welcome Metro Station) Exercise Question 1: A point is on the x axis. What are its y coordinates and z coordinates? Answer If a point is on the x axis, then its y coordinates and z coordinates are zero. Question 2: A point is in the XZ plane. What can you say about its y coordinate? Answer If a point is in the XZ plane, then its y coordinate is zero. Question 3: Name the octants in which the following points lie: (1, 2, 3), (4, 2, 3), (4, 2, 5), (4, 2, 5), ( 4, 2, 5), ( 4, 2, 5), ( 3, 1, 6), (2, 4, 7) Answer The x coordinate, y coordinate, and z coordinate of point (1, 2, 3) are all positive. Therefore, this point lies in octant I.
Class XI Chapter 12 – Introduction to Three Dimensional Geometry Maths Page 2 of 17 Website: www.vidhyarjan.com Email: contact@vidhyarjan.com Mobile: 9999 249717
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