The total surface area of a hemisphere of radius r is
āĻĒā§āĻ°āĻļā§āĻ¨ā§āĻ° āĻāĻ¤ā§āĻ¤āĻ°/ āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž āĻā§āĻ˛ āĻĨāĻžāĻāĻ˛ā§ āĻ¸āĻ āĻŋāĻ āĻāĻ¤ā§āĻ¤āĻ° āĻŦāĻž āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž āĻĻāĻŋāĻ¯āĻŧā§ āĻāĻŋāĻ¤ā§ āĻ¨āĻŋāĻ¨ āĻĒā§āĻ°āĻˇā§āĻāĻžāĻ°āĨ¤