Question

What are Cartesian coordcoordinates? Why we need them?

Answer 1

they represent a fixed point from origins of a graph. they are used in vector calculation, algebra and others. there are usually 2 axis but sometimes 3 are used.

Answer 2

Cartesian coordinates are a pair of numerical coordinates (in which one point is on X-axis and another on Y-axis) are used to identify a point on a plane.

We need Cartesian coordinates in identifying a point on graph or plane.When given coordinates, we can easily identify in which Quadrant it is.And also it helps us to understand about graph,how to locate points in graph,etc

Hope it helps