what are coordinates and how to use them
Coordinates. Coordinates are the numbers used to tell us how to get to a certain point on a grid-eg, a graph or map. The grid will have an x axis which runs horizontally, and a y axis that runs vertically. Coordinates are written in pairs. The coordinate of P on the graph above is (2, 1).
In the coordinate plane, you can use the Pythagorean Theorem to find the distance between any two points. The distance between the two points (x 1 ,y 1) and (x 2 ,y 2) is. For example: To find the distance between A(1,1) and B(3,4), we form a right angled triangle with as the hypotenuse. The length of = 3 â 1 = 2.