Distance in the Coordinate Plane
Distance =
if you’re measuring the distance between the points (x1, y1) and (x2, y2).
if you’re measuring the distance between the points (x1, y1) and (x2, y2).
SAT数学分析——Key Formulas of Coordinate Geometry
if you’re measuring the distance between the points (x1, y1) and (x2, y2).