Surface area of a rectangular prism box. A 2 l w 2 l h 2 w h 2 8 ft 6 ft 2 8 ft 5 ft 2 6 ft 5 ft 236 ft². The formula for surface area of a rectangular prism is A2lw2wh2lh A 2lw 2wh 2lh And the volume of a rectangular prism is the length times the width times the height.
Then find the base area by multiplying the base by the height of the triangle and dividing by 2.
A 6a2 A 6 a 2. Find the lateral area by calculating the perimeter of the base and multiply it by the height of the prism. Surface Area of a Prism Formula. Surface area of a rectangular prism box.