Python3 program to find the number of common tangents between the two circles
def circle ( x1 , y1 , x2 , y2 , r1 , r2 ) : NEW_LINE INDENT distSq = ( x1 - x2 ) * ( x1 - x2 ) + ( y1 - y2 ) * ( y1 - y2 ) NEW_LINE radSumSq = ( r1 + r2 ) * ( r1 + r2 ) NEW_LINE if ( distSq == radSumSq ) : NEW_LINE INDENT return 1 NEW_LINE DEDENT elif ( distSq > radSumSq ) : NEW_LINE INDENT return - 1 NEW_LINE DEDENT else : NEW_LINE INDENT return 0 NEW_LINE DEDENT DEDENT