What is the formula for distance, like on the coordinate plane?
If we have two points (x1, y1) and (x2, y2)....the distance between them is given by :
√ [(x2 - x1)2 + (y2 - y1)2 ]
Example : (0,0) and (3,4) =
√ [ (3 - 0)2 + (4 - 0)2 ] =
√ [32 + 42] =
√ [9 + 16] =
√25 =
5
+87 
