if you sub to my yt channel TTV JessePanda10 you will get 25 points to put your username as an answer.

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

Well if you have 20 bats you probably want 20 balls? you don’t have enough context to answer the question.