Kartesian thalamil irandu puligalin idaiyilaana thoovam thoova suthiram moolam kannakkidappadukiradhu: d = vargamoola[(x2-x1)2 + (y2-y1)2]. Idhu Pythagoras thaththuvam ilirundhu vanthavadhu. Udharanamaga, (2, 3) matrum (6, 7) puligalukkaga: d = vargamoola[16 + 16] = vargamoola 32 sirithaaaga 5.66 allavugal. Unmaiyaana bhoologam matrum velai vilakku vimarppu arivippiyal paadangalukkaga Haversine suthiram payanadhuvom.