circle
rectangle
A = πr2
A = bh
16π
40π
160π
80π
?
?
?
?
circle
A = πr2
16π
160π
circle
triangle
A = πr2
A = 0.5bh
16π
40π
80π
80π
?
?
?
?
circle
A = πr2
16π
16π
circle
rectangle
A = πr2
A = bh
30,976
160π
960,256
5,456
?
?
?
?
rectangle
A = bh
30,976
960,256