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# Points on the coordinate plane —Python: Building data abstractions

One of the essential topics for teaching modeling skills is geometry. Unlike other branches of mathematics, it is visually representable and intuitive for everyone. Let us recall the basic concepts we will deal with. The coordinate plane is the plane that the coordinates system uses.

Coordinates are a set of two lines intersecting at right angles. If the coordinate system is Cartesian, it has called numeric axes:

``````        y |
|
6 |
5 |
4 |
3 |   . (2, 3)
2 |
1 |
----------+--------------------
| 1 2 3 4 5 6       x
|
|
``````

We can place a point — the simplest primitive on a plane. We determine its position by two coordinates, written like this:

``````(2, 3)
``````

The first number is the coordinate on the `x` axis, and the second is on the `y` axis. In the code, it can be represented as a tuple consisting of two elements:

``````# x = 2, y = 3
``````

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