Wolfram Research
Wolfram Math World: Distance
MathWorld.com gives a formula for finding distance using the Pythagorean theorem. The formula for finding the distance between two points in Euclidean space is given on this page. The page has links to related topics.
Education Development Center
Tune in to Learning: Get Going With Rate
Explore the concepts of rate, distance, and speed in this interactive lesson. Discover how to use formulas to solve word problems and calculate salaries. A concise lesson with excellent examples, connections to real world experiences,...