Question

A triangular prism has a length of 8 inches. A larger similar triangular prism has a length of 12 inches.

If 216 square inches of paper is used to wrap the smaller prism with minimum wastage, approximately how many square inches of paper will be required to wrap the larger prism?
Answer
243 square inches
324 square inches
486 square inches
540 square inches

Answer 1

square the ratio of the sides
12/8 = 3/2 --> (3/2)^2 = 9/4

9/4 = x/216
solve for x

Answer 2

would it be 324?

Answer 3

no, how do you get x by itself
multiply both sides by 216

--> x = 216*(9/4)

Answer 4

so 486 thank you