Verkkoaccess these online resources for additional instructions and practice with using the distance and midpoint formulas, and graphing circles. (x1 + x2 2, y1 + y2 2) substitute in the values for (x1, y1) and (x2, y2). Verkkoexamples, videos, worksheets, solutions and activities to help gcse maths students learn how to use the midpoint formula and distance formula.