surface AREA of cylinders

http://www.moomoomath.com/Surface-Area-cylinder.html
http://hotmath.com/help/gt/genericprealg/section_9_4.html
http://www.mathplanet.com/education/pre-algebra/area-and-volume/pyramids,-prisms,-cylinders-and-cones
http://www.ducksters.com/kidsmath/finding_the_volume_surface_area_of_a_cylinder.php
http://www.mathplayground.com/mv_surface_area_cylinders.html
http://www.aaamath.com/exp79x10.htm
http://ca.ixl.com/math/grade-8/surface-area-of-prisms-and-cylinders
http://www.mathsisfun.com/geometry/cylinder.html
https://www.mangahigh.com/en-us/math_games/shape/circles_and_cylinders/surface_area_of_a_cylinder
https://www.mangahigh.com/en-us/math_games/shape