Use the information to answer the following questions. A landscape architect used the entire length of an 80-foot rope to lay out a flower bed in the shape of a square. In another area, he used the entire length of the same rope to lay out a second flower bed in the shape of a circle. (Drawings not to scale.)

Activity 1 of 2
Part A: What is the area of the square?

A.
6,400 ft2

B.
320 ft2

C.
400 ft2

D.
4,000 ft2

Activity 2 of 2
Part B: What is the area of the circle rounded to the nearest square foot?

A.
509 ft2

B.
1,600 ft2

C.
251 ft2

D.
2,037 ft2