Refer to the pets problem at the beginning of this lesson finde the area ti the nearest tent. of grass that Adrianne, s dog may run in if the leash is 9 feet long

The leash will serve as the radius of the circle that Adrianne's dog will be running around on.

radius = 9 feet long

Area = π r²

Area = π (9ft) ²

Area = π 81ft²

Circumference = 2 π r

Circumference = 2 π 9ft

Circumference = 18ft π

The circumference of the circle that the dog will be forming when it runs around his leash is 18ftπ and the area it will cover will be 81ft²π.