Example 5.9 (Corner nodes: linear elements) Input  Number of Boundary Elements = 20  Number of InteriorPoints = 3  Coordinates of the Extreme Points  of the  Boundary Elements   Point      X          Y 1      10.0200     0.0000 2      15.0000     0.0000 3      20.0000     0.0000 4      25.0000     0.0000 5      29.9800     0.0000 6      29.9930     0.6280 7      27.7160    11.4800 8      21.2130    21.2130 9      11.4800    27.716010       0.6280    29.993011       0.0000    29.980012       0.0000    25.000013       0.0000    20.000014       0.0000    15.000015       0.0000    10.020016       0.2090     9.997017       3.8260     9.238018       7.0710     7.071019       9.2380     3.826020       9.9970     0.2090 Boundary  Conditions                First Node             Second Node               Prescribed             PrescribedElement     CODE   Value           CODE    Value 1			 1     0.0000			 1     0.0000 2			 1     0.0000			 1     0.0000 3			 1     0.0000			 1     0.0000 4			 1     0.0000			 1     0.0000 5			 1     0.0000			 0   400.0000 6			 0   400.0000			 0   400.0000 7			 0   400.0000			 0   400.0000 8			 0   400.0000			 0   400.0000 9			 0   400.0000			 0   400.000010			 0   400.0000			 1     0.000011			 1     0.0000			 1     0.000012			 1     0.0000			 1     0.000013			 1     0.0000			 1     0.000014			 1     0.0000			 1     0.000015			 1     0.0000			 0  1000.000016			 0  1000.0000			 0  1000.000017			 0  1000.0000			 0  1000.000018			 0  1000.0000			 0  1000.000019			 0  1000.0000			 0  1000.000020			 0  1000.0000			 1     0.0000Interior Point Coordinates       Xi         Yi    18.4770     7.6530    14.1420    14.1420     7.6530    18.4770 Solution: Boundary Nodes           (X,Y)               u       Prenodal q  Postnodal q(   10.0200,     0.0000)   994.2380     0.0000     0.0000(   15.0000,     0.0000)   775.7899     0.0000     0.0000(   20.0000,     0.0000)   617.7275     0.0000     0.0000(   25.0000,     0.0000)   495.1680     0.0000     0.0000(   29.9800,     0.0000)   404.1531     0.0000     0.0000(   29.9930,     0.6280)   400.0000   -20.6881   -20.6881(   27.7160,    11.4800)   400.0000   -17.7511   -17.7511(   21.2130,    21.2130)   400.0000   -18.4223   -18.4223(   11.4800,    27.7160)   400.0000   -17.7511   -17.7511(    0.6280,    29.9930)   400.0000   -20.6881   -20.6881(    0.0000,    29.9800)   404.1530     0.0000     0.0000(    0.0000,    25.0000)   495.1682     0.0000     0.0000(    0.0000,    20.0000)   617.7275     0.0000     0.0000(    0.0000,    15.0000)   775.7903     0.0000     0.0000(    0.0000,    10.0200)   994.2382     0.0000     0.0000(    0.2090,     9.9970)  1000.0000    61.6049    61.6049(    3.8260,     9.2380)  1000.0000    53.1925    53.1925(    7.0710,     7.0710)  1000.0000    55.4601    55.4601(    9.2380,     3.8260)  1000.0000    53.1924    53.1924(    9.9970,     0.2090)  1000.0000    61.6049    61.6049Interior Points           (Xi,Yi)            u          q_x          q_y(   18.4770,     7.6530)   618.6964   -25.3328    -10.5420(   14.1420,    14.1420)   618.4969   -19.3454    -19.3454(    7.6530,    18.4770)   618.6965   -10.5420    -25.3328