Answer :
C = 2 * pi * r
Plug in what we know:
2pi = 2 * pi * r
Divide 2 pi to both sides:
r = 1
(Remember, anything divided by itself is equal to 1)
A = pi * r^2
Plug in what we know:
A = pi * 1^2
A = pi * 1
A = 1 pi
So the area is '1 pi' or just 'pi'.
Plug in what we know:
2pi = 2 * pi * r
Divide 2 pi to both sides:
r = 1
(Remember, anything divided by itself is equal to 1)
A = pi * r^2
Plug in what we know:
A = pi * 1^2
A = pi * 1
A = 1 pi
So the area is '1 pi' or just 'pi'.
