Autocrat he uses the very popular Cartesian coordinates system for making the drawings and encouraging
Gordon system we have x y and z axis here.
We have this x who are presented with the red line.
The Y-axis are presented with the green line.
And we also have a z axis which we cannot see because we're in the to the plane the Z-axis is pointing
outwards from the screen right now.
Now all the points in this Cartesian system are measured from this point which is the intersection of
x and y axis are the intersection of x y and z axis in 3D.
And that point is taken as 0 0 0 and each zero represents the x y and z axis respectively.
Now if you talk about duty coordinates don't we only have X and Y axis.
So the first coordinate point will be the x axis and the second coordinate point will be right X's as
shown here.
Now if we could see the grids in this drawing area you'll notice that I've divided this complete blog
into grids in horizontal direction so we have these grades in the horizontal and then in what we call
that action and the size of each block of this grid is one by one unit.
So the length and weight of this blog is one unit in each and dedication and the size of this big block
is 10 units in length and 10 units in weight or height.
Now in order to find the coordinates of any point with respect to the origin all we have to do is find
out it's X and Y values.
So let's say that we want to find out the coordinates of this point.
So all we need to do is count the number of x blocks and then a number of my blog.
So in this case we have a number of x blocks S10.
So after 10 blocks we can make a line that will intersect this point.
Now after 10 blocks along the right direction if we make a line it will also need to set the same point.
So the Gordinier of this point is X10 white and that will be then come out then.
Now similarly in this case we have this point and the coordinates of this point will be then x axis
because after Ben blocks along x axis we have this point here and the y coordinate of this point will
be 4.
Because after 4 blocks we have this point.
So the coordinate value of this point will be ten fold.
Now that's the simple Cartesian coordinates system.
Now if you want to use the polar coordinate system then you can do that as well.
And I've made a geometry here.
Now this line starts from the origin and the length of this line is 10 units.
This line is also inclined to an angle of thirty degrees.
So if you don't want to specify the endpoint of this line in terms of Cartesian coordinates system and
you want to specify it in other units which is the polar coordinates system then you need two to present
the values as the length of line and the angle included here.
So that will be the length which is 10 units and then the angle which is 30.
So this will be the value in polar coordinates system.
So now we can represent this endpoint in terms of polar coordinates using this coordinate value and
we'll learn about this later on in this complete course.