Find the area of each circle with the given radius or diameter. Use 3.14 for pi.
r = 4 in
To find the area of a circle, you use the formula A = πr^2.
Given that the radius (r) is 4 inches, we can plug that into the formula:
A = 3.14 x (4)^2
A = 3.14 x 16
A = 50.24 in^2
Therefore, the area of the circle with a radius of 4 inches is approximately 50.24 square inches.
r = 2 in?
To find the area of a circle with a different radius, you would use the same formula A = πr^2.
Given that the radius (r) is 2 inches, we can plug that into the formula:
A = 3.14 x (2)^2
A = 3.14 x 4
A = 12.56 in^2
Therefore, the area of the circle with a radius of 2 inches is approximately 12.56 square inches.
d = 2 in
If the diameter (d) of the circle is 2 inches, and we want to find the area of the circle, we first need to find the radius (r) using the formula r = d/2.
Given that the diameter is 2 inches, the radius would be:
r = 2 / 2
r = 1 inch
Now that we have the radius, we can find the area of the circle using the formula A = πr^2:
A = 3.14 x (1)^2
A = 3.14 x 1
A = 3.14 in^2
Therefore, the area of the circle with a diameter of 2 inches is approximately 3.14 square inches.
r = 8
To find the area of a circle with a radius of 8, you would use the formula A = πr^2.
Given that the radius (r) is 8, we can plug that into the formula:
A = 3.14 x (8)^2
A = 3.14 x 64
A = 200.96
Therefore, the area of the circle with a radius of 8 units is approximately 200.96 square units.
so would d = 12 in be 113.04?
To find the area of a circle with a diameter of 12 inches, we need to first calculate the radius using the formula r = d/2, where d is 12.
r = 12 / 2
r = 6 inches
Now that we have the radius, we can find the area of the circle using the formula A = πr^2:
A = 3.14 x (6)^2
A = 3.14 x 36
A = 113.04 square inches
Therefore, the area of the circle with a diameter of 12 inches is approximately 113.04 square inches.