Area calculation of a large number of polygons

Discussion created by GREENINFORAIN on Nov 12, 2012
Latest reply on Nov 12, 2012 by GREENINFORAIN
i have converted a raster classified image to vector..
the polygons belongs to different features like
evergreen forests: 30 polygons
semievergreen: 80 polygons
Moist decidous forest: 120 polygons etc
how can i calculate the entire area of evergreen forests, semievergreen, etc