27 ft.

40 ft.

27 ft.

54 ft.

24 m

22 m

16 m

12 m

 $c=2\pi r$  

 $c=\pi r$  

 $c=2\pi d$  

18.8 cm.

75.4 cm.

37.7 cm.

not enough information

113.0 in.

1017.4 in.

254.3 in.

56.5 in.

the distance around a shape

the amount of space outside a shape

half the distance around a shape

the amount of space inside a shape

$160\ ft.^2$

160 ft.

$80\ ft.\ ^2$

1600 feet

108 cm²

60 cm²

432 cm²

216 cm²