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
28
Surface Area = 2 × Base Area + Base Perimeter × Length
The surface area is 88.
Surface Area = 2 × Base Area + Base Perimeter × Length
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.
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
432 units^2
2*Area of Bases + Perimeter of base*Length.
Surface area = 2LW + 2(L+W)H