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The symbol 's' is so often used for displacement because the symbol 'd' is often chosen for distance. This is an important distinction in physic â¦ s, where differences between scalar (distance) and vector (displacement) types are used to measure and describe different things.hether s (or d) is used to indicate distance or displacement, the distinction is that a right-facing arrow is placed over the letter to indicate displacement since it is a vector quantity.
Distance Formula and Pythagorean Theorem. The distance formula is derived from the Pythagorean theorem. To find the distance between two points (x 1 ,y 1) and (x 2 ,y 2), all that you need to do is use the coordinates of these ordered pairs and apply the formula pictured below. The distance formula is. $ \text{ Distance } = \sqrt{(x_2 -x_1)^2 + (y_2- y_1)^2} $.