The point (0, 0) is called the:

origin — (0, 0) is the origin.

Chapter 7

Coordinates

Plotting points, and finding the midpoint and distance between two points — with an interactive exercise.

A point is given by coordinates $(x, y)$.

The midpoint of two points is the average of their coordinates. The distance between two points can be found with Pythagoras: the distance from $(0,0)$ to $(3,4)$ is $\sqrt{3^2+4^2} = 5$.

Remember

Midpoint = average of the $x s and the $y s.
Distance uses $\sqrt{(\Delta x)^2 + (\Delta y)^2}$.

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