Introduction to Three Dimensional Geometry
A point in a room needs height as well as position on the floor. Chapter 11, Introduction to Three Dimensional Geometry, of the NCERT Mathematics textbook for Class 11 extends coordinates into space. You will name the three axes and the coordinate planes, locate a point by its ordered triple, compute the distance between two points in space, and find the coordinates that divide a segment in a given ratio. Simple models of rooms and boxes make the third dimension easy to picture.
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