In every IIT JEE maths examination video you will study the topic with all the relevant illustrations. This iit jee maths video lecture is also on a very interesting topic – Point Coordinates.
Rectangular Cartesian coordinate geometry can be divided into few definitions to understand the complete meaning. Rectangle means the one making 90 degrees. In Cartesian coordinate geometry the coordinates are drawn on two perpendicular lines. Basically these perpendicular lines are the two axes. One is names as x-axis and other is named as y-axis.
Apart from this we do the counting of x-axis by the positive such as 1,2,3,4,5,6 etc and negative side such as -1, -2, -3, -4 etc. Similarly the y-axis is marked with the positive and negative sides on either side of the y-axis.
Hence, any point on the plane can be denoted in terms of (x,y). If we consider the x-axis, then the positive side will go on increasing towards the right. Similarly, the positive side of y-axis will go on increasing on the positive side of y-axis. On the other hand, the left side will go on reducing. The intersection of the four perpendicular lines is known as origin. The coordinates of origin is (0,0). This means first is x which will be zero and y is the second value which will also be zero. In between the positive and the negative counting there can be several numbers such as 1.1, 1.5, 2.5 etc. The value of any point on the x-axis is known as abscissa. And the value of y is known as ordinate. Together x and y together makes a coordinate.
In this video lecture for coordinate geometry, you will see that most of the understanding is based on the value of the coordinates (x,y). While watching this video lecture on IIT JEE maths examination always remembers to note the concepts so that you can remember it while revising. There are total four quadrants. When a plane is divided into four parts, then you will get four quadrants namely first quadrant, second quadrant, third quadrant and fourth quadrant.
In the first quadrant you will see both x and y axis are positive, hence denoted by (+,+). In the second quadrant you will see that x axis is negative and y axis is positive, denoted by (-x, y). In the third quadrant both x and y axis are negative, denoted by (-,-). In the last quadrant, you will see that the x axis is positive and y axis is negative, thereby denoted by (+,-).