Question

A semicircular pond has a diameter of 5.2 m. What is the perimeter of the pond?

Answer 1

The perimeter of a circle is equal to 2πR, with R being the radius of the circle. The radius is equal to half the diameter, so R=2.6m. The perimeter you are looking for is equal to the length of half a circle plus the length of the diameter, so: P=πR+D=13.364m.