Areas of Circles and Sectors . Practice Question has two parts. First, answer Part A. Then, answer Part B. ESTIMATION A lawn sprinkler sprays water in an arc as shown in the picture. The area of the sector covered by the spray is approximately 235.6 square feet 120° a. Estimate the area of the yard that can be covered by the sprinkler if the sprinkler is set to water a complete circle. Part B Dane and b. Find the exact area covered by the sprinkler ​