6) 4/5 - 1/2 =
7) 3/4 - 2/5 =
8) 7/10 - 2/3 =
9) 3/4 - 1/5 =
10) 1/4 - 1/5 =

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

Subtract 2 from all the first numbers and add 3 to all the second ones for new coordinates

1/125 probability for each student so, a 0.8 percent probably of winning per student.