Question
What is the area of a circle that has a radius of 8 inches? Use 3.14 for pi.
A. 25.12 inches squared
B. 200.96 inches squared
C. 50.13 inches squared
D. 12.56 inches squared
A. 25.12 inches squared
B. 200.96 inches squared
C. 50.13 inches squared
D. 12.56 inches squared
Answers
Answer
The approximate circumference of a circular flag is 56.52 inches. Use 3.14 for pi.
What is the diameter of the flag?
A. 20 inches
B. 18 inches
C. 36 inches
D. 9 inches
What is the diameter of the flag?
A. 20 inches
B. 18 inches
C. 36 inches
D. 9 inches
Answer
Find the circumference of a circle that has a radius of 17cm. Use 3.14 for pi. Round your answer to the nearest hundredths place.
A. 26.69 cm
B. 106.76 cm
C. 53.38 cm
D. 907.46 cm
A. 26.69 cm
B. 106.76 cm
C. 53.38 cm
D. 907.46 cm
Answer
If C=12 pi, what is the area of the circle?
A. 36 pi
B. 24 pi
C. 12 pi
D. 144 pi
A. 36 pi
B. 24 pi
C. 12 pi
D. 144 pi
Answer
Which chart is correctly developed with the circumference and the area of a circle with a radius of 5cm?
A. Radius: 5 cm Circumference 1.57 cm Area: 19.63 cm²
B. Radius: 5 cm Circumference: 31.4 cm Area: 31.4 cm²
C. Radius: 5 cm Circumference: 78.5 cm Area 31.4 cm²
D. Radius: 5 cm Circumference: 62.8 cm Area: 314 cm²
A. Radius: 5 cm Circumference 1.57 cm Area: 19.63 cm²
B. Radius: 5 cm Circumference: 31.4 cm Area: 31.4 cm²
C. Radius: 5 cm Circumference: 78.5 cm Area 31.4 cm²
D. Radius: 5 cm Circumference: 62.8 cm Area: 314 cm²
Answered by
GPT 3.5
B. 200.96 inches squared
The formula to calculate the area of a circle is: A = π r^2
Given that the radius is 8 inches, we can substitute that into the formula:
A = 3.14 * 8^2
A = 3.14 * 64
A = 200.96 inches squared
Therefore, the area of a circle with a radius of 8 inches is 200.96 inches squared.
The formula to calculate the area of a circle is: A = π r^2
Given that the radius is 8 inches, we can substitute that into the formula:
A = 3.14 * 8^2
A = 3.14 * 64
A = 200.96 inches squared
Therefore, the area of a circle with a radius of 8 inches is 200.96 inches squared.
Answered by
GPT 3.5
To find the diameter of the flag, we can use the formula for the circumference of a circle:
C = π * d
Given that the circumference of the flag is approximately 56.52 inches, we can substitute that into the formula along with π ≈ 3.14 to solve for the diameter (d):
56.52 = 3.14 * d
d ≈ 56.52 / 3.14
d ≈ 18
Therefore, the diameter of the flag is approximately 18 inches. Therefore, the correct answer is:
B. 18 inches.
C = π * d
Given that the circumference of the flag is approximately 56.52 inches, we can substitute that into the formula along with π ≈ 3.14 to solve for the diameter (d):
56.52 = 3.14 * d
d ≈ 56.52 / 3.14
d ≈ 18
Therefore, the diameter of the flag is approximately 18 inches. Therefore, the correct answer is:
B. 18 inches.
Answered by
GPT 3.5
To find the circumference of a circle with a radius of 17 cm, we can use the formula for circumference:
C = 2 * π * r
Given that the radius is 17 cm and using π ≈ 3.14, we can calculate the circumference:
C = 2 * 3.14 * 17
C = 106.76 cm
Therefore, the circumference of a circle with a radius of 17 cm is 106.76 cm.
The closest answer choice is:
B. 106.76 cm
C = 2 * π * r
Given that the radius is 17 cm and using π ≈ 3.14, we can calculate the circumference:
C = 2 * 3.14 * 17
C = 106.76 cm
Therefore, the circumference of a circle with a radius of 17 cm is 106.76 cm.
The closest answer choice is:
B. 106.76 cm
Answered by
GPT 3.5
To find the area of a circle when given the circumference, we can use the formula for circumference with pi (π):
C = 2 * π * r
Given that C = 12π and using the formula, we can solve for the radius (r):
12π = 2π * r
r = 6
Now, to find the area of the circle, we can use the formula for the area:
A = π * r^2
A = π * 6^2
A = 36π
Therefore, the area of the circle is 36π, which corresponds to answer choice A.
C = 2 * π * r
Given that C = 12π and using the formula, we can solve for the radius (r):
12π = 2π * r
r = 6
Now, to find the area of the circle, we can use the formula for the area:
A = π * r^2
A = π * 6^2
A = 36π
Therefore, the area of the circle is 36π, which corresponds to answer choice A.
Answered by
GPT 3.5
To find the circumference and area of a circle with a radius of 5 cm, we can use the following formulas:
Circumference = 2 * π * r
Area = π * r^2
Given that the radius is 5 cm:
Circumference = 2 * π * 5 = 10π ≈ 31.4 cm (approximately)
Area = π * 5^2 = 25π ≈ 78.5 cm² (approximately)
The correct chart is:
B. Radius: 5 cm Circumference: 31.4 cm Area: 78.5 cm²
This corresponds to the correct values calculated for the circumference and area of a circle with a radius of 5 cm.
Circumference = 2 * π * r
Area = π * r^2
Given that the radius is 5 cm:
Circumference = 2 * π * 5 = 10π ≈ 31.4 cm (approximately)
Area = π * 5^2 = 25π ≈ 78.5 cm² (approximately)
The correct chart is:
B. Radius: 5 cm Circumference: 31.4 cm Area: 78.5 cm²
This corresponds to the correct values calculated for the circumference and area of a circle with a radius of 5 cm.