An easy way to remember the formulae is to put distance speed and time or the letters D S and T into a triangle. Mathematically if you want to determine the distance between two points on a coordinate plane you use the distance formula. So P Q x 2 x 1 2 y 2 y 1 2 z 2 z 1 2 PQsqrtx_2-x_1 2y_2-y_1 2z_2-z_1 2 P Q x 2 x 1 2 y 2 y 1 2 z 2 z 1 2.
P Q x 1 x 2 2 y 1 y 2 2.
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 derived from the Pythagorean theorem. P Q x 1 x 2 2 y 1 y 2 2. That is that you have two points.