How many 1/4 teaspoon doses are im 7/8 teaspoon of medicine

To start, first make the denominators of 1/4 and 7/8 the same, so find their greatest common factor. This would be 8, so since 7/8 already has 8 as it's denominator, turn 1/4 to 2/8. Then, think about how many 2/8s would go into 7/8 which would be 3.5. Another easier way to do this would to just divide 7/8 and 1/4 which would be 28/8 or 3.5.

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