area of a side = 0,8 *6/2 = 0,8*3 = 2,4 feet squared
lateral area = 4*2,4 = 9,6 feet squared
area of base = 0,8*0,8 = 0,64 feet squared
total surface area = lateral area + area of base
total SA = 9,6 +0,64 = 10,24 feet squared
hope this will help you