The area of circular garden is 530.66 ft2. What is the circumference of the garden? Use = 3.14.

A=π r²

530.66 = 3.14 r²

530.66/3.14 = 3.14/3.14 (r²)

r² = 169

√r²=√169

r=13

Now that you have your radius you can figure out circumference.

Circumference = 2 π r

Circumference = 2 X 3.14 X 13

Circumference = 81.64 ft