This page helps you to learn about the Distance Formula, used to find the length of any straight line for which you know the coordinates of the endpoints.
Click on the Example sheet, the Exercise sheet and the Answers sheet in order to view and print them.
Watch the video as many times as you wish.
Use the Example sheet as a model to help you complete the Exercise sheet.
Use the Answers sheet to correct your work.
Video #1: Using the Distance Formula
Video #2: Which is Point 1 and Which is Point 2?
Note: In these 2 videos, the positions of x1 and x2 in the formulas used are reversed, as are the positions of y1 and y2. This makes no difference to the results. You will find slightly different-looking versions of this formula in various texts and online resources. In all cases, it is merely a modified version of Pythagorean Theorem.