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EXERCISE 12.1
introduction to three dimensional geometry ncert solutions class 11 Exercise 12.1 ) 
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EXERCISE 12.2
Find the distance between the following pairs of points how that the points are collinear 
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Find the equation of the set of points which are equidistant from the points 
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Find the equation of the set of points P, the sum of whose distances from 
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EXERCISE 12.2
Find the coordinates of the point which divides the line segment joining the points 
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Given that P, Q and R are collinear. Find the ratio in which Q divides PR. 
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Find the ratio in which the YZ plane divides the line segment formed by joining 
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Using section formula show that the points A , B and are collinear. 
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Find the coordinates of the points which trisect the line segment joining the points 
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Miscellaneous Exercise on Chapter 12
Three vertices of a parallelogram ABCD are A, B and C Find the coordinates of the fourth vertex. 
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Find the lengths of the medians of the triangle with vertices A (0, 0, 6), B (0,4, 0) and (6, 0, 0). 
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If the origin is the centroid of the triangle PQR with vertices then find the values of a, b and c. 
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Find the coordinates of a point on yaxis which are at a distance of 5 root 2 from the point P 
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A point R with x coordinate 4 lies on the line segment joining the points 
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ncert solution for class 11 chapter 12 Introduction to 3D geometry Exercise and miscellaneous 
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