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- Hello! I was not able to attend Maths class yesterday. What was done in last class ?
- Teacher started a new concept - Plotting of co-ordinate points on cartesian plane.
- Please explain it to me.
- Sure, it is simple and useful chapter.
- So, what is a cartesian plane ?
- Cartesian plane has two axis - X and Y which are used to divide complete plane into 4 quadrants so that the location of point could be correctly specified.
- How is it useful in real life?
- If we wish to plot different places on a sheet of plane, cartesian plane could be used. X axis and Y axis would be equivalent to the East-West and North-South directions and co-ordinates of points would represent location of different places relative to the reference point i.e. , origin.
- This is interesting but we would require to set scale. I mean like 10km = 1cm or 20km = 2cm.
- Yes, we would determine scales approximately for X and Y axis so that distances are correctly depicted on sheet of paper.
- Would you please describe about terminologies - origin, co-ordinate.
- Okay. Origin is the reference point in the cartesian plane where X and Y axis intersect. It divides the plane into 4 quadrants. Co-ordinates are represented as {X, Y) or for example (4, 3) which specify that the location of point is 4 blocks above the X-axis and 3 blocks from Y-axis in the upper-right side .
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