At the movie theatre, child admission is 6.10 and adult admission is 9.30 . on tuesday, 138tickets were sold for a total sales of 1021.00. how many child tickets were sold that day?

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