11cm
Surface area = 2*(12*8 + 8*9 + 9*12) sq cm = 2*(96 + 72 + 108) = 552 cm2
The surface area of a prism is the two bases and all the sides A = 2 *area of base + Perimeter of base * Height of prism.
The surface area of a prism = 2 × area of base + perimeter of base × H
Surface Area = 2 × Base Area + Base Perimeter × Length
28
The surface area is 88.
Surface Area = 2 × Base Area + Base Perimeter × Length
Rectangular Prism surface area formula is Area = 2 (wh + lw + lh) (Length x width of a side) x 2 + (length x width of perpendicular side) x 2 + (length x width of end) x 2 = surface area of a rectangular prism
surface area prism = 2 × area end + total area side = 2 × area end + perimeter end × length of prism The information given to you will allow you to work out the area of one pentagonal end, and the perimeter of the pentagonal end.
Surface area = 2LW + 2(L+W)H
432 units^2
2*Area of Bases + Perimeter of base*Length.