Don walsh and jacques piccard:
were the first men to walk on the moon
orbited the earth in a bathyscaph
explored the deepest known ocean trench
designed the space station mir

The answer would be

explored the deepest known ocean trench.

Hoped that helped :3

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

It says in the questions that it is 6.5?