text: Length of direct common tangent between the two non | Function to find the length of the direct common tangent ; Driver code
code: function lengtang ( r1 , r2 , d ) { document . write ( " " + Math . sqrt ( Math . pow ( d , 2 ) - Math . pow ( ( r1 - r2 ) , 2 ) ) ) ; } var r1 = 4 , r2 = 6 , d = 12 ; lengtang ( r1 , r2 , d ) ;