Question

A track has the shapes shown. what is the perimeter ?

Answer 1

Break this problem down first. You have two lines each with length of 5. You also have two halves of a circle, combine them to get a full circle with a radius of 2. The formula to find the perimeter of a circle is
$2\pi \times r$
and this gives a perimeter of 12.566 for the circle. Add this to your sides and you get a total of 22.566 which is answer B