cad如何计算图形面积

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select * from tbl_Articles WHERE ArticleID=2780383 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2780383 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2780383 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1084452,1162826,705214,1299158,1039284,956621,1015210,689315,415987,646435,1018632,1118988,1130887,1192334,456007,612476,1495350,580709,1049253,530979,858666,767289,741448,450005,1013063,449197,1229679,369523,380511,703822) ORDER BY field (ArticleID,1084452,1162826,705214,1299158,1039284,956621,1015210,689315,415987,646435,1018632,1118988,1130887,1192334,456007,612476,1495350,580709,1049253,530979,858666,767289,741448,450005,1013063,449197,1229679,369523,380511,703822)