Which prisms are similar to a prism with a length of 10 feet, a width of 6 feet, and a height of 12 feet?

choose:
prism with a length of 5 feet, a width of 3 feet, and a height of 6 feet

prism with a length of 8 feet, a width of 4 feet, and a height of 10 feet

prism with a length of 15 feet, a width of 9 feet, and a height of 18 feet

prism with a length of 20 feet, a width of 12 feet, and a height of 24 feet

The first, third, and last

Step-by-step explanation:

The first prism has a length of 5, which is half of the original, a width of 3, which is also half, and a height of 6, which is once again half. Since all of the dimensions are in the same ratio to the original pyramid, they must be similar. The same applies to the third and fourth pyramids, except with different scales. Hope this helps!

a ≈ 172.05

step-by-step explanation:

the pictures.

10+4√2 is the answer. i dont have the time to explain.