This lesson shows how to apply the distance formula in \(1D\) by solving step‑by‑step examples.

The distance formula is one of the most important topics in coordinate geometry. It has many real‑world applications and connects to distance formulas in higher dimensions. In \(1D\), the points lie on a straight line.

❖ According to the distance formula in \(1D\):

The distance between two points on a line is equal to the square root of the square of their difference.

So, if you know the coordinates of two points on a line, you can easily calculate the distance between them.

For example, if you have two points \(P_1\) and \(P_2\) on a line, the distance \(d\) between them is:

$$d=\sqrt{(P_2 – P_1)^2}$$

✅ This always gives a positive value for the distance \(d\).

❖ The \(1D\) distance formula is the foundation for the distance formulas you’ll learn in \(2D\) and \(3D\).

✅ This lesson is perfect for students learning how to use the distance formula in \(1D\) with clear examples. Watch it to build a strong foundation for higher dimensions!

✨ Watch next:

🔹 Distance Formula in \(2D\)

🔹 Distance Formula in \(3D\)