# Lesson goal: The distance formula with variables

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In a past lesson, the distance formula as covered, which is $d=\sqrt{(x-x_0)^2+(y-y_0)^2}$. This formula will tell you the "straight line" distance between any two points on a cartesian coordinate system. As this formula is stated, one point will be $(x,y)$ and the other will be $(x_0,y_0)$.

The implementation in the past lesson was a bit cumbersome. Using variables makes it much more convenient. In this lesson, we'll see if you can program and use the distance formula using variables.

# Now you try. Use the print statement to find the distance between two xy points using the variables defined.

You have to admit, the variables make this distance formula program very clear to read and easy to use! But this is the power of variables! Dismiss.
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