How to count the surface area of a prism and a cuboid

584.96

Step-by-step explanation:

Surface area of the shape( as a whole) = sum of all the sides visible from outside.( include base of cuboid, because it is technically seen)

Area of back and front of cuboid= 8 x 6 x 2(because back and front) = 96 cm squared

Area of sides x 2 = 144 cm squared

Area of base = 96 cm squared

Area of slope of prism x 2 = 9 x 12 = 216 cm squared

To find area of cross section in prism, use Pythagorean theorem.

C squared minus b squared = a squared

81(9sqauared) - 64 = 17

Square root of 17 is 4.12

Now,

Area of front and back of slope times 2 = 1/2 x 8 x 4.12 = 32.96

Now , add then all up 584.96

Hope this helps

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d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336