1.) Calculate the area of a circle with radius 8.5 inches. . 2.) Calculate the area of a circle with the diameter 15 feet. . 3.) Calculate the area of a circle with radius 9 feet
Area = pi * radius squared
1)
A = 3.14 * 8.5^2
A = 3.14 * 72.25
A = 226.865 square inches
I'll be glad to check your answers for the other two problems.
Area of a circle is given by
A=πr²
where π=3.1416 approximately
So with a radius of 8.5 inches, the area of the circle is
A=π8.5²=72.25π sq. inches.
Remember to include the units.
If you are given a diameter, divide the diameter by two to get the radius, and proceed as above.
Sure! I can help you with that.
1.) To calculate the area of a circle, you can use the formula A = πr^2, where A represents the area and r represents the radius.
Using this formula, we can calculate the area of a circle with a radius of 8.5 inches.
A = π(8.5)^2
= π(72.25)
≈ 227.27 square inches
So, the area of the circle is approximately 227.27 square inches.
2.) To calculate the area of a circle with the diameter, you first need to find the radius. The radius is half the value of the diameter.
Given a diameter of 15 feet, the radius would be (15 feet / 2) = 7.5 feet.
Now, we can use the formula A = πr^2 to calculate the area.
A = π(7.5)^2
= π(56.25)
≈ 176.71 square feet
So, the area of the circle is approximately 176.71 square feet.
3.) Similar to the previous question, we need to find the radius of the circle first. Given a radius of 9 feet, we can use the formula A = πr^2 to calculate the area.
A = π(9)^2
= π(81)
≈ 254.47 square feet
So, the area of the circle is approximately 254.47 square feet.
To calculate the area of a circle, you can use the formula:
Area = π * r^2
Where π is a mathematical constant approximately equal to 3.14159, and r is the radius of the circle.
1.) For a circle with a radius of 8.5 inches:
- Plug the given radius into the formula: Area = 3.14159 * 8.5^2
- Calculate the area: Area ≈ 3.14159 * 72.25 ≈ 226.98 square inches
Therefore, the area of the circle with a radius of 8.5 inches is approximately 226.98 square inches.
2.) For a circle with a diameter of 15 feet:
- First, find the radius of the circle by dividing the diameter by 2: radius = 15 / 2 = 7.5 feet
- Plug the calculated radius into the formula: Area = 3.14159 * 7.5^2
- Calculate the area: Area ≈ 3.14159 * 56.25 ≈ 176.71 square feet
So, the area of the circle with a diameter of 15 feet is approximately 176.71 square feet.
3.) For a circle with a radius of 9 feet:
- Plug the given radius into the formula: Area = 3.14159 * 9^2
- Calculate the area: Area ≈ 3.14159 * 81 ≈ 254.47 square feet
Therefore, the area of the circle with a radius of 9 feet is approximately 254.47 square feet.