Mark placed a pool in his backyard which is closed by a triangular fence. the radius of the pool is 20.5 feet how much of the backyard area is not covered by the pool

The area of the backyard which is not covered by the pool= 2644.415 square feet

Step-by-step explanation:

The image for the question is attached herewith

Solution

Radius of the pool = 20.5 feet

Area of the pool

square feet

Total area with in the triangular fencing

The area of the backyard which is not covered by the pool=  The area of the triangular fence - the area of the  pool

Square feet

answer: i think it is (1,-2)

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80