The Distance Between the Points (P, Q)and (A, B)is Given $d = \sqrt { ( p - q ) ^ { 2 } + ( a - b ) ^ { 2 } }$

The distance between the points (p, q)and (a, b)is given by $d = \sqrt { ( p - q ) ^ { 2 } + ( a - b ) ^ { 2 } }$