surface area of a prism

{"cid":"91201126","title":"Combiner Cross Dichroic Acrylic Glass RGB Prism Cube","imgUrl":"https:\/\/img.chinax.com\/nimg\/cc\/90\/941746164e4ad48843f7378a1ff3-200x200-1.jpg","attrs":{"Price":"$100.00\/Pieces 10-99 Pieces","Brand Name":"advance","Model Number":"005","Minimum Order Quantity":"10 Pieces","Place of Origin":"Shanghai, China","Packaging Details":"Vacuum+EVA+Carton","Supply Ability":"10000000 Piece\/Pieces per Month","Warranty":"-","Customized support":"OEM, ODM","Material":"BK7 and other optical glass, BK7 and other optical glass,quartz,sapphire,Ge,Si,ZnSe,CaF2 etc","Surface Quality":"60\/40","Dimension Tolerance":"+\/-0.01mm","Angle Tolerance":"3\"~2'","Flatness":"N=1~3","length":"3-100mm","Width":"3-100mm","Height":"3-100mm","Length tolerance":"+\/-0.01mm","Width tolerance":"+\/-0.01mm","Angle tolerance":"3\"-2'","Surface quality":"10\/5~60\/40","Application area":"Imaging,Lighting,Laser etc","Coating":"Upon request","Port":"shanghai"}}