A circular sheet of paper in which two straight lines cutting orthogonally at the centre
enables the child to conceptualize that the two lines divide the circle into four equal
parts and each is a Quadrant.
Provision of the concrete material on paper, can be supplemented by the verbal
explanation of the teacher to enhance the learning of the child.
- Origin
The point of intersection of the x-axis and the y- axis is the origin which is normally
denoted by the letter ‘O’. Note that the origin has coordinates (0,0).
Note : 1. Any point on the x-axis has its y-coordinate 0.
- Any point on the y-axis has its x-coordinate 0.
- All points on a line parallel to x-axis have the same y-coordinate.
- All points on a line parallel to y-axis have the same x-coordinate.
The embossed diagram used for teaching the idea of rectangular coordinate system
may be used for teaching the idea of origin also. Paper with dotted lines and
geo-board may also be used for teaching these concepts.
- Abscissa (X-coordinate)
Any point in the rectangular coordinate system is denoted as a set of points,
a x-coordinate and the y-coordinate. The x-coordinate is also called as the abscissa.
The embossed diagram used for teaching the idea of rectangular coordinate system
may be used for teaching the idea of origin also. A Braille sheet depicting a graph
may be used to explain this concept.
- Ordinate (Y-coordinate)
Any point in the rectangular coordinate system is denoted as a set of points, a
x-coordinate and the y-coordinate. The y-coordinate is also called as the ordinate.
The embossed diagram used for teaching the idea of rectangular coordinate system
may be used for teaching the idea of origin also.
