# Distance Formula

Let and be any two points on the line. We will find the distance between P and Q.

For this, draw PM and QN perpendicular to the X–Axis.

From P draw PR perpendicular to QN.

Consider the right angle triangle

I. First we find the distance between P and R.

II. Secondly, we find the distance between R and Q.

III. Finally, we find the distance between P and Q.

By using the Pythagorean Theorem we have