



 
Tammy, You didn't include a diagram so I drew my own. The straight sides are 90 m each and the total perimeter is 400 m so the semicircular ends have a total perimeter of 400  (2 × 90) = 220 m. Thus if you put the two semicircles together you have a circle of circumference 220 metres. What is the diameter of a circle with a circumference of 200 metres? Without the diagram I can't help with part 2 but hopefully what I suggested on part 1 will allow you to complete part 2. Penny  


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