The formula to calculate the area of a circle is A = πr^2, where A is the area and r is the radius of the circle.
Given that the area of the circle is 28.26 cm^2, we can set up the equation as:
28.26 = πr^2
Solving for r, we get:
r^2 = 28.26 / π
r^2 = 9
r = √9
r = 3
Therefore, the radius of the circle is 3 cm.
If the area of a circle is 28.26 cm2 , what is the radius of the circle?(1 point)
cm
7 answers
are you sure?
Let's double-check:
Given that the area of a circle is A = 28.26 cm^2, we can use the formula for the area of a circle:
A = πr^2
Substitute the given area:
28.26 = πr^2
Divide both sides by π:
r^2 = 28.26 / π
r^2 = 9
Take the square root of both sides:
r = √9
r = 3
Therefore, the radius of the circle is indeed 3 cm. So, yes, I am confident that the radius is 3 cm.
Given that the area of a circle is A = 28.26 cm^2, we can use the formula for the area of a circle:
A = πr^2
Substitute the given area:
28.26 = πr^2
Divide both sides by π:
r^2 = 28.26 / π
r^2 = 9
Take the square root of both sides:
r = √9
r = 3
Therefore, the radius of the circle is indeed 3 cm. So, yes, I am confident that the radius is 3 cm.
Complete the table by finding the circumference and area of a circle with a radius of 279 inches. Substitute 3.14 for pi. Express your answers to the hundredths place.(1 point)
Radius Circumference Area
279 in.
in.
in.2
Radius Circumference Area
279 in.
in.
in.2
Radius: 279 inches
Circumference = 2πr
Circumference = 2 * 3.14 * 279
Circumference = 1750.92 inches
Area = πr^2
Area = 3.14 * 279^2
Area = 3.14 * 77841
Area = 244374.74 square inches
Completing the table:
Radius: 279 inches
Circumference: 1750.92 inches
Area: 244374.74 square inches
Circumference = 2πr
Circumference = 2 * 3.14 * 279
Circumference = 1750.92 inches
Area = πr^2
Area = 3.14 * 279^2
Area = 3.14 * 77841
Area = 244374.74 square inches
Completing the table:
Radius: 279 inches
Circumference: 1750.92 inches
Area: 244374.74 square inches
are you sure ?
Let's double check:
Given:
Radius = 279 inches
π = 3.14
Circumference = 2πr
Circumference = 2 * 3.14 * 279
Circumference = 1751.52 inches
Area = πr^2
Area = 3.14 * 279^2
Area = 3.14 * 77841
Area = 244423.94 square inches
Completing the table:
Radius: 279 inches
Circumference: 1751.52 inches
Area: 244423.94 square inches
Therefore, after double-checking the calculations, the correct values are:
- Circumference: 1751.52 inches
- Area: 244423.94 square inches.
Given:
Radius = 279 inches
π = 3.14
Circumference = 2πr
Circumference = 2 * 3.14 * 279
Circumference = 1751.52 inches
Area = πr^2
Area = 3.14 * 279^2
Area = 3.14 * 77841
Area = 244423.94 square inches
Completing the table:
Radius: 279 inches
Circumference: 1751.52 inches
Area: 244423.94 square inches
Therefore, after double-checking the calculations, the correct values are:
- Circumference: 1751.52 inches
- Area: 244423.94 square inches.